Shady_Vader Said:
"Regarding The AirPods Pro: I have tried a number of things at this point such seating and reseating the the AirPods and yes both the AirPods are charging.: [...]The issue is just limited to my Mac. Also noice cancelling and transparency mode just work fine it's just the Audio that is not playing through the left one."
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Troubleshooting Mac Volume:
What Comes to Mind:
I can think of a bunch of things to Try:
A. Verify the Connection:
See if the speaker is even seen:
- Hold Down: the Option key
- Click: the Apple menu
- Select:: About this Mac...
- Click: System Report... button
- Select: Bluetooth (on the left of screen)
- Look For: this Bluetooth device
B. Try Reseting the Core Audio:
Type the following command in Terminal:
sudo killall coreaudiod
C. Perform a SMC and NVRAM Reset:
(Applies to Intel-Only Macs): Sometimes changes are made to the system(i.e. updates) and then settings (i.e. for Power) become manipulated, technically. So, reset both the SMC and NVRAM on your Mac.
D. Single Out this User:
Create an administrator to temporary use. Then, try the using them with that user. If it works, then it is a mis configuration with the current user. If it does not work, then it is an issue with the macOS itself.
E. Try in Safe Mode:
[Hold Down: the shift key upon boot]. In Safe Mode, Login Items do not load at login, certain System Preferences are set aside, and damed system file (i.e. caches) are intentionally fixed.
and...
F. As a Last Resort...
Reinstalling the macOS:
Go Here: How to Reinstall macOS from macOS Recovery - Apple Support
Important: First, Back Up your Mac:
Create a Time Machine backup of your Mac, so that you can have something to restore your Mac from, should anything go wrong with the reinstall. Take this as a learning experience, knowing to always create a backup of your Mac, prior to making any major changes to it (i.e. update installation)