The sound can stop working on your MacBook at any time for a variety of reasons. Because it has so many possible causes, it's hard to pin down exactly when your MacBook can lose audio, but this ...
Ensure that your Mac's volume hasn't been muted unintentionally. Press the volume up key (F12) to turn up the sound level. If the volume is low, press the F12 key repeatedly to increase it. For more ...
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