HT203186: Troubleshooting issues with no audio from built-in speakers on Macs
Learn about Troubleshooting issues with no audio from built-in speakers on MacsQ: MacBook air has issues with sound. My output in sound pane doesn't detect the in-built speakers. However, it does work with cordle ... MacBook air has issues with sound. My output in sound pane doesn't detect the in-built speakers. However, it does work with cordless, bluetooth headphones. more
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Helpful answers
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Oct 20, 2015 5:00 AM in response to smrittiby dominic23,1.Plug in and remove the headphone.
If you see red light in the headphone port, plug the headphone
in and out of the port 5 or 6 times to flip the microswitch inside.
Sound output may be stuck in the digital mode.
2. Reset SMC.
Choose the method for “On Mac notebooks with non-removable battery”.
https://support.apple.com/en-us/HT201295
3. Reset PRAM. http://support.apple.com/kb/PH18761