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My internal speakers stopped worked soon after updating to MacOS Big Sur. Sometimes the speakers work and once I restart the computer they stop. I have also realised that the computer is not completely shutting down it’s like it will be on hibernation. I chose not to show open windows when I restart the computer but it keeps bringing back those open windows. I am on a MacBook Air Early 2015.
MacBook Air 13″, macOS 11.4
If the internal speakers on your Mac aren't working
If you don't hear sound from the built-in internal speakers on your Mac, make sure macOS is up to date and check your settings.
Check your sound settings
First, disconnect any cables from the USB, Thunderbolt, or 3.5mm audio ports on your Mac.
How are you shutting down the computer ? By what means / measure are you determining the computer is not totally turned off ?
When choosing to shutdown via Apple Icon >> Shutdown are you Unclenching the Dialogue box to Not Open Windows when logging in ? If yes, then suggest go to System Preferences >> Users & Groups >> Choose your Account >> Left Side and look for Tab Called Login Items. Inside there are Applications set to startup when the computer starts from a Cold Boot. Remove all items you do not what to start.
If the internal speakers on your Mac aren't working
If you don't hear sound from the built-in internal speakers on your Mac, make sure macOS is up to date and check your settings.
Check your sound settings
First, disconnect any cables from the USB, Thunderbolt, or 3.5mm audio ports on your Mac.
How are you shutting down the computer ? By what means / measure are you determining the computer is not totally turned off ?
When choosing to shutdown via Apple Icon >> Shutdown are you Unclenching the Dialogue box to Not Open Windows when logging in ? If yes, then suggest go to System Preferences >> Users & Groups >> Choose your Account >> Left Side and look for Tab Called Login Items. Inside there are Applications set to startup when the computer starts from a Cold Boot. Remove all items you do not what to start.
When I updated to Big Sur my sound started misbehaving.
