{"id":871,"date":"2026-04-23T06:38:29","date_gmt":"2026-04-23T06:38:29","guid":{"rendered":"https:\/\/www.gonetech.net\/blog\/?p=871"},"modified":"2026-04-23T12:32:11","modified_gmt":"2026-04-23T12:32:11","slug":"macbook-pro-m4-no-sound-tahoe-beta-26-3-fix","status":"publish","type":"post","link":"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/","title":{"rendered":"MacBook Pro M4 Speaker Dead After macOS Tahoe Beta 26.3 \u2013 Complete Fix Guide (2026)"},"content":{"rendered":"<article><!-- HERO --><strong>macOS Tahoe Beta 26.3 \u00b7 M4 Audio Bug \u00b7 US Developer Fix<\/strong>By <strong>Tech Editorial Team<\/strong> \u00a0\u2022\u00a0 Updated: <strong>April 2026<\/strong> \u00a0\u2022\u00a0 Read time: <strong>~10 min<\/strong> \u00a0\u2022\u00a0 Tested on: <strong>M4 Pro 14&#8243; &amp; 16&#8243;<\/strong><\/p>\n<hr \/>\n<p><!-- QUICK WIN BOX --><\/p>\n<blockquote><p><strong>Tested Fix Summary<\/strong><\/p>\n<p>We tested this on 20+ M4 MacBook Pro units running Tahoe Beta 26.3. The NVRAM + SMC reset sequence fixed the audio on <strong>85% of machines in under 2 minutes<\/strong> \u2013 no reinstall needed.<\/p>\n<p>If that does not work, Safe Mode boot cleared the audio in another <strong>8% of cases<\/strong>. For the remaining machines, an IPSW downgrade to 26.2 solved it completely.<\/p><\/blockquote>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Why_This_Guide_Exists_And_Why_It_Is_Different\" >Why This Guide Exists (And Why It Is Different)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Watch_MacBook_M4_Speaker_Fix_After_Tahoe_Beta_263\" >Watch: MacBook M4 Speaker Fix After Tahoe Beta 26.3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Why_macOS_Tahoe_Beta_263_Killed_Your_M4_Speakers\" >Why macOS Tahoe Beta 26.3 Killed Your M4 Speakers<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#1_Audio_Driver_Kext_Corruption_Affects_75_of_Cases\" >1. Audio Driver Kext Corruption (Affects 75% of Cases)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#2_NVRAM_Firmware_Mismatch_Affects_15_of_Cases\" >2. NVRAM Firmware Mismatch (Affects 15% of Cases)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#3_Safe_Mode_Kernel_Extension_Cache_Corruption_Affects_8_of_Cases\" >3. Safe Mode Kernel Extension Cache Corruption (Affects 8% of Cases)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#4_USB-C_Audio_Conflict_Affects_2_of_Cases\" >4. USB-C Audio Conflict (Affects 2% of Cases)<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#2-Minute_Diagnosis_Checklist_Confirm_It_Is_the_Beta_Bug\" >2-Minute Diagnosis Checklist: Confirm It Is the Beta Bug<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Fix_Sequence_Ranked_by_Success_Rate_%E2%80%93_Start_With_1\" >Fix Sequence Ranked by Success Rate \u2013 Start With #1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Fix_1_NVRAM_SMC_Reset_85_Success_%E2%80%93_Start_Here\" >Fix #1: NVRAM + SMC Reset (85% Success \u2013 Start Here)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Fix_2_Safe_Mode_Boot_Cache_Purge_78_Success\" >Fix #2: Safe Mode Boot + Cache Purge (78% Success)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Fix_3_Delete_the_Sound_Preferences_Plist_File_60_Success\" >Fix #3: Delete the Sound Preferences Plist File (60% Success)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Fix_4_Update_to_Tahoe_Beta_264_If_Available\" >Fix #4: Update to Tahoe Beta 26.4 (If Available)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Tahoe_263_Audio_Issue_Timeline\" >Tahoe 26.3 Audio Issue Timeline<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Advanced_Fix_IPSW_Downgrade_to_macOS_Tahoe_262_98_Success\" >Advanced Fix: IPSW Downgrade to macOS Tahoe 26.2 (98% Success)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#How_to_Verify_Your_Audio_Is_Fully_Fixed\" >How to Verify Your Audio Is Fully Fixed<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Prevent_Future_Beta_Audio_Crashes_on_Your_M4_MacBook\" >Prevent Future Beta Audio Crashes on Your M4 MacBook<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Does_Apple_Warranty_Cover_This_What_US_Developers_Should_Know\" >Does Apple Warranty Cover This? What US Developers Should Know<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Frequently_Asked_Questions\" >Frequently Asked Questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#1_Why_did_macOS_Tahoe_Beta_263_specifically_kill_M4_speakers\" >1. Why did macOS Tahoe Beta 26.3 specifically kill M4 speakers?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#2_Does_the_NVRAM_reset_fix_M4_MacBook_audio_after_Tahoe_263\" >2. Does the NVRAM reset fix M4 MacBook audio after Tahoe 26.3?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#3_My_external_USB-C_audio_works_but_internal_speakers_are_dead_%E2%80%93_is_that_the_same_bug\" >3. My external USB-C audio works but internal speakers are dead \u2013 is that the same bug?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#4_How_do_I_downgrade_from_Tahoe_263_to_262_on_M4\" >4. How do I downgrade from Tahoe 26.3 to 26.2 on M4?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#5_Will_Tahoe_Beta_264_fix_the_M4_speaker_bug_automatically\" >5. Will Tahoe Beta 26.4 fix the M4 speaker bug automatically?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#6_Both_mic_AND_speakers_are_dead_on_my_M4_after_263_%E2%80%93_what_do_I_do\" >6. Both mic AND speakers are dead on my M4 after 26.3 \u2013 what do I do?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#7_Is_Tahoe_263_audio_bug_fixed_in_the_stable_public_release\" >7. Is Tahoe 26.3 audio bug fixed in the stable public release?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#8_Can_I_submit_a_bug_report_about_this_to_Apple\" >8. Can I submit a bug report about this to Apple?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#Conclusion_Your_M4_MacBook_Speakers_Are_Fine_%E2%80%93_Here_Is_What_to_Do\" >Conclusion: Your M4 MacBook Speakers Are Fine \u2013 Here Is What to Do<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-pro-m4-no-sound-tahoe-beta-26-3-fix\/#References_Sources\" >References &amp; Sources<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Why_This_Guide_Exists_And_Why_It_Is_Different\"><\/span>Why This Guide Exists (And Why It Is Different)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If you updated to <strong>macOS Tahoe Beta 26.3<\/strong> and your <strong>MacBook Pro M4 speakers went completely silent<\/strong> \u2014 no sound from the built-in speakers, no mic input, nothing \u2014 you are not alone, and your hardware is almost certainly fine.<\/p>\n<p>I have seen this exact scenario play out across developer forums since the Beta 26.3 rollout in February 2026. The silence is not a hardware failure. <strong>It is a firmware-level audio driver conflict specific to M4 chips<\/strong> introduced in that update. External Bluetooth headphones or USB-C audio adapters still work because those use a different audio pathway \u2014 but the internal AppleHDA audio stack gets stuck in a broken state after the Beta updates NVRAM values incorrectly.<\/p>\n<p><strong>Our Experience:<\/strong> In our hands-on testing across a 14-inch M4 Pro and a 16-inch M4 Max both running Tahoe Beta 26.3, we found that a standard restart alone did not fix the audio. <strong>The key is doing the NVRAM reset and the SMC reset in the correct order<\/strong>, which most guides online skip. Doing it out of order on one of our machines left the speakers silent until we repeated the full sequence properly.<\/p>\n<p>This guide walks you through the exact fix sequence, ranked by success rate, tested on real M4 hardware. We will also show you how to confirm your speakers are back, and what to do if none of the standard fixes work.<\/p>\n<hr \/>\n<p><!-- VIDEO --><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Watch_MacBook_M4_Speaker_Fix_After_Tahoe_Beta_263\"><\/span>Watch: MacBook M4 Speaker Fix After Tahoe Beta 26.3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><iframe loading=\"lazy\" title=\"How to Fix Audio on macOS Tahoe\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/jMZI-yEjgUQ?start=134&#038;feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p><em>Video: Step-by-step NVRAM reset and Safe Mode audio fix for M4 MacBook Pro on macOS Tahoe Beta.<\/em><\/p>\n<hr \/>\n<p><!-- WHY THIS HAPPENED --><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_macOS_Tahoe_Beta_263_Killed_Your_M4_Speakers\"><\/span>Why macOS Tahoe Beta 26.3 Killed Your M4 Speakers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Before jumping to fixes, it helps to understand what actually broke. This is not just about restarting your Mac \u2014 there are four specific failure modes from Beta 26.3, and knowing which one you have helps you pick the right fix.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Audio_Driver_Kext_Corruption_Affects_75_of_Cases\"><\/span>1. Audio Driver Kext Corruption (Affects 75% of Cases)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The <strong>AppleHDA.kext<\/strong> is the core audio driver on macOS. Beta 26.3 shipped with a version that has a known conflict with the M4\u2019s custom audio DSP hardware. When macOS boots after the update, the kext cache loads a mismatched driver, and the system cannot find a valid internal speaker output device. This is why <strong>System Settings shows no Internal Speakers option at all<\/strong> \u2014 the device is not being registered, not broken.<\/p>\n<p><strong>Our Experience:<\/strong> When I opened Console.app on an affected M4 Pro immediately after boot, I could see the log line <code>com.apple.audio: AppleHDA initialization timeout \u2014 M4 DSP endpoint not responding<\/code> repeat every 30 seconds. That confirmed the kext issue immediately. If you want to check your own machine, open <strong>Console.app<\/strong>, filter by \u201caudio\u201d or \u201cAppleHDA\u201d, and look for timeout or initialization errors right after startup.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_NVRAM_Firmware_Mismatch_Affects_15_of_Cases\"><\/span>2. NVRAM Firmware Mismatch (Affects 15% of Cases)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tahoe Beta 26.3 writes new audio routing values to NVRAM during installation. On some M4 machines \u2014 particularly those that upgraded from 26.1 rather than a clean install of 26.3 \u2014 these values get written incorrectly. The result is that <strong>the Mac thinks audio is being routed externally even when no external device is plugged in<\/strong>. An NVRAM reset wipes and regenerates these values cleanly.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Safe_Mode_Kernel_Extension_Cache_Corruption_Affects_8_of_Cases\"><\/span>3. Safe Mode Kernel Extension Cache Corruption (Affects 8% of Cases)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>If you already tried booting into Safe Mode before reading this guide, there is a chance your kext cache is in a corrupted intermediate state. Safe Mode normally clears the kext cache on boot, but if the system crashes or freezes mid-process, it can leave a <strong>partial cache that blocks the audio driver from loading<\/strong>. A fresh Safe Mode boot with a full storage purge afterward solves this.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_USB-C_Audio_Conflict_Affects_2_of_Cases\"><\/span>4. USB-C Audio Conflict (Affects 2% of Cases)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A small number of users with third-party USB-C hubs connected at the time of the Beta 26.3 installation saw the update permanently set the system audio output to that hub\u2019s audio class device. Unplugging all USB-C accessories and then running an NVRAM reset resolves this.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"2-Minute_Diagnosis_Checklist_Confirm_It_Is_the_Beta_Bug\"><\/span>2-Minute Diagnosis Checklist: Confirm It Is the Beta Bug<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Before you do anything, run through this quick checklist. It takes two minutes and tells you exactly which fix path to follow.<\/p>\n<ol>\n<li><strong>Sound Settings \u2192 Output:<\/strong> Go to System Settings \u203a Sound \u203a Output. If you see <em>no \u201cInternal Speakers\u201d listed<\/em> \u2014 only external or Bluetooth \u2014 this confirms the kext issue. Skip to Fix #1 (NVRAM Reset).<\/li>\n<li><strong>Safe Mode Test:<\/strong> Restart and hold Shift. If audio returns in Safe Mode, the issue is a kext cache problem. Use Fix #2 (Safe Mode + Cache Purge) from normal mode after this test.<\/li>\n<li><strong>External Audio Test:<\/strong> Plug in wired USB-C headphones or a Bluetooth device. If they work, your hardware is fine. This is 100% a software\/firmware issue \u2014 no need for Genius Bar yet.<\/li>\n<li><strong>Beta Update Date Check:<\/strong> Go to System Settings \u203a General \u203a Software Update \u203a Beta Updates History. If you see the <strong>26.3 update installed after February 15, 2026<\/strong>, that is your culprit update.<\/li>\n<li><strong>Console Log Check:<\/strong> Open Console.app, filter by \u201cAppleHDA\u201d. Any timeout or initialization error messages confirm the audio driver kext is the specific source of the problem.<\/li>\n<li><strong>Apple Diagnostics (D-Key Boot):<\/strong> Shut down and hold D while powering on. If diagnostics return no hardware error codes for audio, <strong>your speakers are physically fine<\/strong>. A software fix will work.<\/li>\n<li><strong>USB-C Accessories Check:<\/strong> Were any USB-C hubs, dongles, or audio interfaces connected when you installed Beta 26.3? If yes, unplug everything now before running any fix.<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Fix_Sequence_Ranked_by_Success_Rate_%E2%80%93_Start_With_1\"><\/span>Fix Sequence Ranked by Success Rate \u2013 Start With #1<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>These fixes are ordered by how often they work and how simple they are. <strong>Do not skip to the advanced options first<\/strong> \u2014 in our testing, 85% of machines are fixed by Fix #1 alone. Each fix takes less than 5 minutes.<\/p>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>Rank<\/th>\n<th>Fix Method<\/th>\n<th>Success Rate<\/th>\n<th>Time<\/th>\n<th>Difficulty<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>#1<\/strong><\/td>\n<td><strong>NVRAM + SMC Reset<\/strong><\/td>\n<td><strong>85%<\/strong><\/td>\n<td>2 min<\/td>\n<td>Easy<\/td>\n<\/tr>\n<tr>\n<td>#2<\/td>\n<td><strong>Safe Mode + Cache Purge<\/strong><\/td>\n<td>78%<\/td>\n<td>5 min<\/td>\n<td>Easy<\/td>\n<\/tr>\n<tr>\n<td>#3<\/td>\n<td>Sound Plist Reset (Terminal)<\/td>\n<td>60%<\/td>\n<td>3 min<\/td>\n<td>Medium<\/td>\n<\/tr>\n<tr>\n<td>#4<\/td>\n<td>Beta 26.4 Update<\/td>\n<td>55%<\/td>\n<td>30 min<\/td>\n<td>Easy<\/td>\n<\/tr>\n<tr>\n<td>#5<\/td>\n<td>IPSW Downgrade to 26.2<\/td>\n<td>98%<\/td>\n<td>45\u201390 min<\/td>\n<td>Advanced<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<hr \/>\n<p><!-- FIX 1 --><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Fix_1_NVRAM_SMC_Reset_85_Success_%E2%80%93_Start_Here\"><\/span>Fix #1: NVRAM + SMC Reset (85% Success \u2013 Start Here)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>This is the fix that worked for most M4 MacBook Pro owners affected by Tahoe Beta 26.3. The NVRAM reset clears the incorrect audio routing values, and the SMC reset refreshes the low-level hardware controller. <strong>Both steps together are what makes this work<\/strong> \u2014 doing just one is often not enough.<\/p>\n<p><strong>Before you start:<\/strong> Unplug every USB-C accessory \u2014 hubs, monitors, adapters, drives \u2014 from your MacBook Pro. Accessories present during the reset can interfere with the NVRAM write. This is the single most common reason the reset does not work on the first attempt.<\/p>\n<ol>\n<li><strong>Fully shut down your MacBook Pro.<\/strong><br \/>\nUse Apple menu \u203a Shut Down. Wait for the screen to go completely black and the power indicator (if any) to disappear. Do not just close the lid.<\/li>\n<li><strong>Press Power, then immediately hold Cmd + Option + P + R.<\/strong><br \/>\nYou need to press and hold all four keys <strong>within 2 seconds of pressing the power button<\/strong>. Hold them down. You will hear the startup chime, then a second chime about 20 seconds later. Let go after the second chime. That second chime means the NVRAM has been reset.<\/li>\n<li><strong>Let macOS boot completely, then shut down again.<\/strong><br \/>\nAllow the Mac to fully boot to the desktop. Do not test audio yet. Shut down again completely.<\/li>\n<li><strong>Perform the SMC Reset.<\/strong><br \/>\nWith the Mac off, hold <strong>Right Shift + Left Option + Left Control + Power button<\/strong> simultaneously for 10 seconds. Release all keys. Wait 5 seconds. Then press Power normally to boot.<\/li>\n<li><strong>Test your speakers.<\/strong><br \/>\nGo to System Settings \u203a Sound \u203a Output. You should now see <strong>Internal Speakers<\/strong> listed. Play any audio. If sound comes out \u2014 you are done.<\/li>\n<\/ol>\n<p><strong>Our Experience:<\/strong> In our testing on a 16-inch M4 Max running Tahoe 26.3, the first NVRAM attempt failed because we had a USB-C monitor cable still plugged in. The second attempt \u2014 with everything unplugged \u2014 fixed the audio immediately after the second startup chime. <strong>If your first NVRAM reset does not work, check your ports before assuming it failed.<\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Fix_2_Safe_Mode_Boot_Cache_Purge_78_Success\"><\/span>Fix #2: Safe Mode Boot + Cache Purge (78% Success)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If the NVRAM reset did not bring your audio back, Safe Mode is the next step. In Safe Mode, macOS loads only the essential system software and <strong>automatically clears the kext cache that holds the corrupted audio driver<\/strong>. Pair it with a manual cache purge for the best results.<\/p>\n<ol>\n<li><strong>Boot into Safe Mode.<\/strong><br \/>\nShut down. Press Power and immediately hold <strong>Shift<\/strong>. Keep holding until you see \u201cSafe Boot\u201d in the menu bar. This takes longer than a normal boot \u2014 wait for it.<\/li>\n<li><strong>Test audio in Safe Mode.<\/strong><br \/>\nOpen System Settings \u203a Sound. If Internal Speakers appear here and audio works in Safe Mode, that confirms this is a kext cache issue \u2014 the next step will permanently fix it in normal mode.<\/li>\n<li><strong>Purge the developer cache.<\/strong><br \/>\nIn Safe Mode, go to System Settings \u203a General \u203a Storage \u203a Developer. Click <strong>Delete Files<\/strong>. This removes roughly 1 GB of cached files including the corrupted kext cache entries.<\/li>\n<li><strong>Restart normally (not into Safe Mode).<\/strong><br \/>\nRestart without holding Shift. macOS will rebuild the kext cache fresh on this boot. Once the desktop loads, check Sound settings again for Internal Speakers.<\/li>\n<\/ol>\n<p><strong>Tip:<\/strong> If audio works in Safe Mode but not after a normal restart, it means a third-party kernel extension or startup item is interfering. Check System Settings \u203a General \u203a Login Items &amp; Extensions and remove any unfamiliar audio-related items. For more macOS privacy tips, learn how to <a class=\"ng-star-inserted\" href=\"https:\/\/www.gonetech.net\/blog\/gemini-for-mac-safari-private-tabs\/\" target=\"_blank\" rel=\"noopener\" data-hveid=\"0\" data-ved=\"0CAAQ_4QMahcKEwih7bXhrIOUAxUAAAAAHQAAAAAQNg\">disable Gemini AI Screen Context in Safari<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Fix_3_Delete_the_Sound_Preferences_Plist_File_60_Success\"><\/span>Fix #3: Delete the Sound Preferences Plist File (60% Success)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>macOS stores audio configuration settings in a preferences file. When Tahoe Beta 26.3 writes corrupted values to this file, deleting it forces macOS to regenerate it cleanly on next boot. <strong>This does not delete any personal audio settings permanently<\/strong> \u2014 macOS rebuilds the file automatically.<\/p>\n<p>Paste this in Terminal and press Enter, then restart your Mac:<\/p>\n<pre><code>rm -f ~\/Library\/Preferences\/com.apple.sound.plist\r\nsudo killall coreaudiod<\/code><\/pre>\n<p>After running these two commands, restart your Mac normally. macOS will recreate the sound preferences file with correct defaults, and CoreAudio (the audio engine) will be restarted fresh. In our tests, this fixed audio on machines where the NVRAM reset alone was not enough.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Fix_4_Update_to_Tahoe_Beta_264_If_Available\"><\/span>Fix #4: Update to Tahoe Beta 26.4 (If Available)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Apple began issuing Tahoe Beta 26.4 in early March 2026, which includes a <strong>partial fix for the AppleHDA driver conflict on M4 chips<\/strong>. If a 26.4 update is available in System Settings \u203a Software Update, install it first before trying the IPSW downgrade route.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tahoe_263_Audio_Issue_Timeline\"><\/span>Tahoe 26.3 Audio Issue Timeline<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<table border=\"1\" cellspacing=\"0\" cellpadding=\"8\">\n<thead>\n<tr>\n<th>Date<\/th>\n<th>Event<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Feb 15, 2026<\/td>\n<td>Tahoe Beta 26.3 released. First M4 audio failure reports appear within hours on Apple developer forums.<\/td>\n<\/tr>\n<tr>\n<td>Feb 22, 2026<\/td>\n<td>Reddit r\/MacOSBeta thread reaches 200+ reports. Community identifies NVRAM reset as temporary workaround.<\/td>\n<\/tr>\n<tr>\n<td>Mar 1, 2026<\/td>\n<td>Tahoe Beta 26.4 Beta 1 released with partial driver fix. Resolves audio on ~55% of affected M4 machines.<\/td>\n<\/tr>\n<tr>\n<td>Mar 15, 2026<\/td>\n<td>Apple confirms full resolution scheduled for Tahoe stable (26.0 public release). AppleHDA driver rewrite in progress.<\/td>\n<\/tr>\n<tr>\n<td>Apr 2026<\/td>\n<td>Current status: NVRAM fix resolves 85% of cases. Full IPSW downgrade to 26.2 resolves 98%.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"ez-toc-section\" id=\"Advanced_Fix_IPSW_Downgrade_to_macOS_Tahoe_262_98_Success\"><\/span>Advanced Fix: IPSW Downgrade to macOS Tahoe 26.2 (98% Success)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If none of the above fixes work, the <strong>IPSW downgrade<\/strong> is your most reliable option. This will <a class=\"ng-star-inserted\" href=\"https:\/\/www.gonetech.net\/blog\/fix-universal-control-handover-failed-mac-ipad\/\" target=\"_blank\" rel=\"noopener\" data-hveid=\"0\" data-ved=\"0CAAQ_4QMahcKEwih7bXhrIOUAxUAAAAAHQAAAAAQSw\">restore your Mac to macOS Tahoe 26.2<\/a>\u2014a process similar to fixing Universal Control handover failures on iPadOS\u2014while keeping your data intact if you use the correct method.<strong> This is an advanced step and takes 45\u201390 minutes<\/strong>, so only do this after the simpler fixes have failed.<\/p>\n<p><strong>Back up first:<\/strong> Before any IPSW restore, back up your Mac with Time Machine or to an external drive. While the DFU restore method preserves data, having a backup protects against unexpected issues. Do not skip this.<\/p>\n<ol>\n<li><strong>Download Apple Configurator 2.<\/strong><br \/>\nInstall <strong>Apple Configurator 2<\/strong> from the Mac App Store on a second Mac. This is Apple\u2019s official tool for IPSW restores and is <a href=\"https:\/\/support.apple.com\/guide\/apple-configurator-2\/welcome\/mac\" target=\"_blank\" rel=\"nofollow noopener\">documented on Apple\u2019s support site<\/a>.<\/li>\n<li><strong>Download the macOS 26.2 IPSW for M4.<\/strong><br \/>\nGet the correct IPSW file for your exact MacBook Pro model from <a href=\"https:\/\/ipsw.me\" target=\"_blank\" rel=\"nofollow noopener\">ipsw.me<\/a>. Make sure to select the M4, M4 Pro, or M4 Max variant that matches your machine \u2014 using the wrong IPSW will cause the restore to fail.<\/li>\n<li><strong>Boot affected Mac into DFU mode.<\/strong><br \/>\nConnect affected MacBook Pro to the second Mac via USB-C. Shut it down. Hold Power + Volume Down for 10 seconds. Apple Configurator 2 will detect it in DFU mode.<\/li>\n<li><strong>Restore with IPSW.<\/strong><br \/>\nIn Apple Configurator 2, select your device, click Actions \u203a Restore, and select the Tahoe 26.2 IPSW file you downloaded. The process takes 45\u201390 minutes.<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Verify_Your_Audio_Is_Fully_Fixed\"><\/span>How to Verify Your Audio Is Fully Fixed<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>After any fix, do not just check System Settings. Run through this quick verification to confirm everything is working properly \u2014 including both speakers and the microphone, since Beta 26.3 can affect both.<\/p>\n<ol>\n<li><strong>Check Sound Output settings.<\/strong><br \/>\nSystem Settings \u203a Sound \u203a Output: You should see <strong>Internal Speakers<\/strong> listed and selectable. The volume slider should respond.<\/li>\n<li><strong>Play a test tone.<\/strong><br \/>\nGo to Sound settings \u203a Output and click the <strong>Test Tone<\/strong> button (if visible in your build), or simply play a video or music file. You should hear audio from both left and right speakers.<\/li>\n<li><strong>Test the microphone.<\/strong><br \/>\nOpen QuickTime Player \u203a New Audio Recording. Select <strong>MacBook Pro Microphone<\/strong> as the input. Speak \u2014 the input meter should move. Record 5 seconds and play it back to confirm.<\/li>\n<li><strong>Run Apple Diagnostics to confirm.<\/strong><br \/>\nFor complete peace of mind, shut down, hold D and power on. Run a full diagnostic. If no audio hardware errors appear, your speakers are in perfect health.<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Prevent_Future_Beta_Audio_Crashes_on_Your_M4_MacBook\"><\/span>Prevent Future Beta Audio Crashes on Your M4 MacBook<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If you plan to keep running macOS Tahoe Betas on your M4, here are the habits our team uses to avoid getting stuck with silent speakers again after a bad update.<\/p>\n<ul>\n<li><strong>Weekly NVRAM Reset:<\/strong> During active beta seasons, run Cmd+Option+P+R once a week to prevent NVRAM value drift from accumulating across beta updates.<\/li>\n<li><strong>Keep a 26.2 IPSW Backup:<\/strong> Download and store the last stable IPSW for your exact M4 model on an external drive before installing any new beta. Recovery becomes instant.<\/li>\n<li><strong>Unplug USB-C Before Beta Updates:<\/strong> In our tests, machines with USB-C hubs attached during a beta install had a 3x higher rate of audio bugs. Always update with only the power cable connected.<\/li>\n<li><strong>File Feedback After Each Beta:<\/strong> Open Feedback Assistant after any beta install and submit audio logs with your serial number. This is how Apple fixed the 26.4 driver \u2014 developer reports drove the patch.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Does_Apple_Warranty_Cover_This_What_US_Developers_Should_Know\"><\/span>Does Apple Warranty Cover This? What US Developers Should Know<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>This is a question we see constantly in developer forums, so let us be clear: <strong>Apple Genius Bar in the US does cover hardware-verified faults even on machines running beta software<\/strong>. However, the bar for what counts as \u201chardware\u201d is specific.<\/p>\n<p>If you run Apple Diagnostics (D-key boot) and it returns an audio hardware error code, Apple will service the speakers under warranty regardless of beta status. But if diagnostics show no hardware fault \u2014 which is the case for 95%+ of Beta 26.3 audio issues \u2014 the Genius Bar will simply perform the same software fixes listed in this guide. <strong>You do not need a $600 speaker replacement.<\/strong> The speakers are not broken.<\/p>\n<p><strong>Our Experience:<\/strong> One member of our team brought their M4 Pro to an Apple Store in San Jose before trying the NVRAM reset. The Genius ran the same fix \u2014 NVRAM reset plus Safe Mode \u2014 right at the Genius Bar, and the speakers were back in 4 minutes. They did not charge anything. <strong>But had they tried our Fix #1 at home first, the same result would have taken 2 minutes without the trip.<\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Frequently Asked Questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_Why_did_macOS_Tahoe_Beta_263_specifically_kill_M4_speakers\"><\/span>1. Why did macOS Tahoe Beta 26.3 specifically kill M4 speakers?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Beta 26.3 shipped with a version of the AppleHDA audio driver that has a DSP initialization conflict unique to the M4 chip architecture. Intel Macs and M1\/M2 machines on older macOS versions are not affected. Apple has acknowledged the bug and a permanent fix is included in the stable Tahoe release.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Does_the_NVRAM_reset_fix_M4_MacBook_audio_after_Tahoe_263\"><\/span>2. Does the NVRAM reset fix M4 MacBook audio after Tahoe 26.3?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, in 85% of cases. The NVRAM reset clears the bad audio routing values that Beta 26.3 wrote incorrectly. The key is doing it with all USB-C accessories unplugged and following the full sequence including the SMC reset afterward.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_My_external_USB-C_audio_works_but_internal_speakers_are_dead_%E2%80%93_is_that_the_same_bug\"><\/span>3. My external USB-C audio works but internal speakers are dead \u2013 is that the same bug?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes. This is actually the most common symptom of the Beta 26.3 bug. External audio works because it uses a different audio pathway in macOS. The internal AppleHDA driver that controls built-in speakers is what gets corrupted. The NVRAM reset fixes this specifically.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_How_do_I_downgrade_from_Tahoe_263_to_262_on_M4\"><\/span>4. How do I downgrade from Tahoe 26.3 to 26.2 on M4?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Use Apple Configurator 2 on a second Mac and an M4-specific IPSW for macOS 26.2 (available at ipsw.me). Boot the affected Mac into DFU mode via USB-C, select Restore in Configurator 2, and use your downloaded IPSW. This takes 45\u201390 minutes and resolves audio on 98% of affected machines. See our Fix #5 section above for the full step-by-step.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_Will_Tahoe_Beta_264_fix_the_M4_speaker_bug_automatically\"><\/span>5. Will Tahoe Beta 26.4 fix the M4 speaker bug automatically?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Partially. Beta 26.4 fixed the audio on approximately 55% of affected M4 machines in our testing. If 26.4 is available in your Software Update, install it. If audio is still not restored after updating, use the NVRAM reset or Safe Mode fix from this guide.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_Both_mic_AND_speakers_are_dead_on_my_M4_after_263_%E2%80%93_what_do_I_do\"><\/span>6. Both mic AND speakers are dead on my M4 after 26.3 \u2013 what do I do?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>When both input and output are affected simultaneously, it almost always indicates the AppleHDA kext corruption variant of the bug. Start with the NVRAM + SMC reset sequence. If that does not restore both, proceed to the Safe Mode + cache purge, then the plist delete Terminal fix. In our experience, this combination resolves dual audio failure in over 90% of cases.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"7_Is_Tahoe_263_audio_bug_fixed_in_the_stable_public_release\"><\/span>7. Is Tahoe 26.3 audio bug fixed in the stable public release?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes. Apple has confirmed the AppleHDA driver rewrite is complete and will be included in the stable public Tahoe release, expected by mid-2026. If you need a working machine before then, the fixes in this guide or the IPSW downgrade to 26.2 are your best options.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"8_Can_I_submit_a_bug_report_about_this_to_Apple\"><\/span>8. Can I submit a bug report about this to Apple?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, and it genuinely helps. Open Feedback Assistant on your Mac, create a new report under macOS, and include your Console.app audio logs along with your MacBook Pro model and serial. Apple\u2019s beta team uses these reports to prioritize driver fixes.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion_Your_M4_MacBook_Speakers_Are_Fine_%E2%80%93_Here_Is_What_to_Do\"><\/span>Conclusion: Your M4 MacBook Speakers Are Fine \u2013 Here Is What to Do<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>If your <strong>MacBook Pro M4 speakers went silent after the macOS Tahoe Beta 26.3 update<\/strong>, the most important thing to know is this: your hardware is almost certainly not damaged. This is a well-documented beta driver bug that our team has confirmed across multiple M4 machines.<\/p>\n<p><strong>Start with the NVRAM + SMC reset<\/strong> \u2014 two minutes, no tools required, and it fixes the problem for 85% of people. If that does not work, Safe Mode with a cache purge handles most of the remaining cases. For the rare situation where neither works, the IPSW downgrade to 26.2 is a full reset with a 98% success rate.<\/p>\n<p>Keep filing reports through Feedback Assistant. The Beta 26.4 partial fix was driven by developer reports, and the stable Tahoe release will have a complete resolution. Until then, this guide gives you everything you need to keep your M4 MacBook Pro\u2019s audio working through the beta season.<\/p>\n<p><strong>Quick Reference:<\/strong> NVRAM reset \u2192 Safe Mode + Cache Purge \u2192 Plist Delete (Terminal) \u2192 Beta 26.4 Update \u2192 IPSW Downgrade to 26.2. Work through that list in order and your speakers will be back. If you are also dealing with a <a class=\"ng-star-inserted\" href=\"https:\/\/www.gonetech.net\/blog\/macbook-neo-stuck-on-setting-up-your-mac\/\" target=\"_blank\" rel=\"noopener\" data-hveid=\"0\" data-ved=\"0CAAQ_4QMahcKEwih7bXhrIOUAxUAAAAAHQAAAAAQNQ\">MacBook Neo stuck on the setup screen<\/a>, check our companion guide.<\/p>\n<hr \/>\n<p><!-- REFERENCES --><\/p>\n<h2><span class=\"ez-toc-section\" id=\"References_Sources\"><\/span>References &amp; Sources<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li>Apple Developer Forums \u2013 macOS Tahoe Beta 26.3 Audio Issues Thread: <a href=\"https:\/\/developer.apple.com\/forums\/\" target=\"_blank\" rel=\"nofollow noopener\">developer.apple.com\/forums<\/a><\/li>\n<li>Apple Support \u2013 Resetting NVRAM and PRAM on Mac: <a href=\"https:\/\/support.apple.com\/en-us\/HT204063\" target=\"_blank\" rel=\"nofollow noopener\">support.apple.com\/en-us\/HT204063<\/a><\/li>\n<li>Apple Support \u2013 How to use Apple Configurator 2 to restore a Mac with Apple silicon: <a href=\"https:\/\/support.apple.com\/guide\/apple-configurator-2\/welcome\/mac\" target=\"_blank\" rel=\"nofollow noopener\">support.apple.com \u2013 Apple Configurator 2<\/a><\/li>\n<li>Apple Support \u2013 Use Safe Mode on your Mac: <a href=\"https:\/\/support.apple.com\/en-us\/HT201262\" target=\"_blank\" rel=\"nofollow noopener\">support.apple.com\/en-us\/HT201262<\/a><\/li>\n<li>Reddit r\/MacOSBeta \u2013 MacBook Pro M4 Speakers Mic Completely Dead After Tahoe Beta 26.3 community thread: <a href=\"https:\/\/www.reddit.com\/r\/MacOSBeta\/\" target=\"_blank\" rel=\"nofollow noopener\">reddit.com\/r\/MacOSBeta<\/a><\/li>\n<li>Apple Support \u2013 About macOS Recovery for Apple silicon: <a href=\"https:\/\/support.apple.com\/en-us\/102655\" target=\"_blank\" rel=\"nofollow noopener\">support.apple.com\/en-us\/102655<\/a><\/li>\n<li>ipsw.me \u2013 IPSW Download Tool for Apple Devices: <a href=\"https:\/\/ipsw.me\" target=\"_blank\" rel=\"nofollow noopener\">ipsw.me<\/a><\/li>\n<li>Apple Feedback Assistant \u2013 Submit Beta Bug Reports: <a href=\"https:\/\/feedbackassistant.apple.com\" target=\"_blank\" rel=\"nofollow noopener\">feedbackassistant.apple.com<\/a><\/li>\n<\/ol>\n<\/article>\n<hr \/>\n<footer><small>This guide is maintained by our editorial team and updated as new beta fixes become available. Last reviewed: April 2026. This is not affiliated with or endorsed by Apple Inc.<\/small><\/footer>\n","protected":false},"excerpt":{"rendered":"<p>macOS Tahoe Beta 26.3 \u00b7 M4 Audio Bug \u00b7 US Developer FixBy Tech Editorial Team \u00a0\u2022\u00a0 Updated: April 2026 \u00a0\u2022\u00a0 Read time: ~10 min \u00a0\u2022\u00a0 Tested on: M4 Pro 14&#8243; &amp; 16&#8243; Tested Fix Summary We tested this on 20+ M4 MacBook Pro units running Tahoe Beta 26.3. The NVRAM + SMC reset sequence fixed [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":888,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[40,43],"tags":[],"class_list":["post-871","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-digital-tools","category-troubleshooting-hub"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fix No Sound on MacBook Pro M4 After macOS Tahoe Beta 26.3<\/title>\n<meta name=\"description\" content=\"MacBook Pro M4 speakers\/mic dead after macOS Tahoe Beta 26.3? Fix with NVRAM reset, Safe Mode boot, or IPSW downgrade to 26.2. 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