Left speaker of my macbook pro is not working. on restart very litile sound come and if I do any setting change it's goes completely. And on accessing system preferences, the volume control is in the middle.Moving it towards left speaker, no sound comes.Any suggestions??
Is it because new update - 10.15.7 (19H2)?
MacBook Pro 15″, macOS 10.14
Please check if you have same issue in safe mode.
How to use safe mode on your Mac - Apple Support
Note: Safe mode prevents your Mac from loading certain software as it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which are automatically created again as needed.
Hope it helps.
Please check if you have same issue in safe mode.
How to use safe mode on your Mac - Apple Support
Note: Safe mode prevents your Mac from loading certain software as it starts up, including login items, system extensions not required by macOS, and fonts not installed by macOS. It also does a basic check of your startup disk, similar to using First Aid in Disk Utility. And it deletes some system caches, including font caches and the kernel cache, which are automatically created again as needed.
Hope it helps.
Left speaker not working 2018 Mac Book Pro
