Restart your sound controller by opening the “Activity Monitor” and locating “coreaudiod” in the process list.If you want the sound to play through your headphones or speakers while your TV is on, you need to switch to your speakers by clicking on the audio icon found in the Mac menu bar.If your TV is connected via HDMI, for example, your sound is probably being redirected to the TV instead of the headphones or speakers. Other devices could be channeling the sound away from your headphones. That includes HDMI, Thunderbolt, and USB devices. Check all of the ports by disconnecting everything plugged into your Mac.Some models have built-in volume controls that can be turned down or turned off. Check the volume controls on your headphones.Plug the headphones back in while holding the volume buttons at the same time. Try blowing the dust off the jack and from inside the port on your Mac to see if that solves the problem. Dust or fluff is enough to block the port from recognizing your headphones or speakers.
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