Press the power button and hold the following keys immediately: Option + Command + P + R. To perform an NVRAM reset, power off your Mac and wait for it to shut down completely. Resetting the NVRAM can eliminate glitches causing your Mac to stop playing audio, especially if the problem occurs every time you shut down or reboot your Mac. Should this memory become corrupt, some sound-related functionality may fail to work correctly on your Mac. When you modify your Mac’s sound settings, the changes are saved in a component called the Non-Volatile Random Access Memory (NVRAM). If all the troubleshooting steps you’ve taken so far proved abortive, shut down your Mac and turn it back on. Reboot the MacĪ simple device restart can fix all sorts of temporary glitches disrupting your Mac‘s audio functionality. Enter your Mac’s password and press Enter to proceed.
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