MacBook Pro 16 M3 internal microphone not working

Remember that your camera and microphone are considered PRIVATE, and use by any Application requires explicit authorization.

Settings > privacy & security > Microphone ...

... and slide the slider next to any software you DO want to have access to your private microphone data.

ELBALIKO wrote:

Yesterday, during a FaceTime call, my microphone wasn’t reaching the other person. At first I thought it might be a bug, but after checking the settings everything appeared to be fine. In Sound → Input I can see the MacBook microphone, but when I speak nothing happens. I also tried the option below, which is the microphone of my phone, and that one worked without any issues.

At this point I have no idea why my microphone suddenly stopped working or where the problem could be. I’m using a MacBook Pro 16 M3 and I’m very careful with my belongings, so I don’t expect anything to be physically damaged. A few days ago everything was working perfectly, and now out of nowhere it isn’t working anymore.

—Have you shut down and restarted the Mac

>Shut down

—A SafeBoot Start up your Mac in safe mode - Apple Support will sort many anomalies

Login and test. Reboot as normal and test. Caches get rebuilt automatically.

—Take a look at the Audio MIDI Setup .app in your Utilities folder...(?)

Verify Mute is not on microphone— toggle changes to Format and compare your results.

ref: Audio MIDI Setup User Guide for Mac

—ref Apple Support If FaceTime isn't working on your Mac