The audio output on the MacBook Pro turns red. What to do?

Yesterday my MacBook’s audio output turned red and macOS started behaving strangely. The symptoms are as follows:

  1. no sound from built-in speakers (when macOS is loaded);
  2. there is no way to adjust the volume;
  3. sound plays only through headphones or external speakers;
  4. the headphone jack lights up red.

My MacBook Pro’s headphone jack lights up red

As it turned out, the matter is in the closure of the contacts in the headphone jack. And the solution is extremely simple – we take a toothpick and carefully touch the inner walls of the connector, after that everything should work fine. It helped me, so try it.

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