I just updated to Big Sur 11.5 and now my Macbook Pro can't find my mouse. It's connected with a USB cable and adapter and had been working fine earlier today. I've restarted my machine and unplugged and replugged in the mouse, changed the port, etc. Any other ideas?
MacBook Pro 13″, macOS 11.5
Verify that the device appears in System Information: On your Mac, choose Apple menu 
> About This Mac. In the overview that appears, click the System Report button.
https://support.apple.com/guide/mac-help/if-a-usb-device-doesnt-work-mchlp1641/mac
Reset SMC: How to reset the SMC of your Mac - Apple Support Choose the appropriate method.
Quote:
Resetting the system management controller (SMC) can resolve certain issues related to power, battery, fans, and other features.
Startup in Safe mode. https://support.apple.com/en-gb/HT201262 Choose the appropriate method.
To leave Safe Mode, choose “Restart” at the bottom.
Quote:
Safe mode prevents your Mac from loading certain software when 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 will be created again automatically as needed.
Verify that the device appears in System Information: On your Mac, choose Apple menu > About This Mac. In the overview that appears, click the System Report button.
https://support.apple.com/guide/mac-help/if-a-usb-device-doesnt-work-mchlp1641/mac
Reset SMC: How to reset the SMC of your Mac - Apple Support Choose the appropriate method.
Quote:
Resetting the system management controller (SMC) can resolve certain issues related to power, battery, fans, and other features.
Startup in Safe mode. https://support.apple.com/en-gb/HT201262 Choose the appropriate method.
To leave Safe Mode, choose “Restart” at the bottom.
Quote:
Safe mode prevents your Mac from loading certain software when 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 will be created again automatically as needed.
My wireless Mouse will not connect to my MacBook Air but it will sync up with my Imac. What has happened?
MacBook can't find mouse after Big Sur 11.5 update
