I can’t find the software update for my MacBook Air in system preferences

Hello naima256,

Thanks for using Apple Support Communities. It's our understanding that the latest macOS update doesn't appear on your MacBook Air. We're happy to look into this with you.

Try updating the software using the link below:

macOS Big Sur on the Mac App Store

If the issue persists, test the issue while in safe mode. Starting in safe mode allows your Mac to run certain checks, remove caches, and prevent login items from automatically launching. This can isolate possible third party issues. Use the steps and information in the link below for assistance with safe mode:

How to use safe mode on your Mac

Let us know the results. Please include specific error messages and any other troubleshooting steps that you may have tried.

Have a wonderful day!