motashimal Said:
"macbook pro microphone stays mute. Even though, I slide the bar to maximum. Internal Microphone is not working."
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Troubleshoot the Mac Microphone:
What to Try:
If an app has its own audio input settings, then perform the on the app itself.
Verify what your output item is.
If there are any microphones nearby, then they may be getting in the way via bluetooth.
See if an app is permitted to use your microphone.
Sometimes when changes are made to the system(i.e. updates), system configurations (i.e. for Sound) become manipulated, technically. So, reset the SMC and NVRAM. (Applies to Anted-Based Macs Only)
When you boot into Safe Mode, items load by default, with certain settings and caches set aside. So, hold down the shift key upon boot. See what happens then.
- Create a New Administrator:
See if creating and logging in as a new administrator does the trick. There may be something misconfigured in your current user - something that is getting in the way. Go to: System Preferences > Users & Groups > Unlock > Click: "+" > Create the new administrator