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I'm not sure when this started happening, but whenever I turn on my macbook air, the sound is muted and flushed to the right channel. This happens even when i shut down the computer with sound on and balanced sound. I still can hear the start-up chime though. I'm using macOS High Sierra, MacBook Air (13-inch, Mid 2012).
MacBook Air 13″, macOS 10.13
To find out if it's system wide or user specific, try this...
Open System Preferences>Users & Groups, unlock the lock, click on the little plus icon, make a new admin account, log out & into the new account.
Does it work in the new account?
To find out if it's system wide or user specific, try this...
Open System Preferences>Users & Groups, unlock the lock, click on the little plus icon, make a new admin account, log out & into the new account.
Does it work in the new account?
Try resetting the SMC.
How to reset the SMC of your Mac - Apple Support
If that doesn't work, try resetting NVRAM.
Any luck yet?
I tried this. It doesn't work on the new account either
Sound is muted and flushed to right channel every time on start-up
