MacBook Air login screen randomly appears (frequently)

Hey there, bluepencil13!

Thanks so much for using Apple Support Communities.

It sounds like your Mac is automatically logging out after a while. This can be a great way to keep your computer secure but if you're not looking to have that happen, it can definitely be surprising. We're happy to help with this, though. To start, we want to recommend starting with this article: Set your Mac to log out when not in use. If that is indeed what's going on, this will help you customize that feature to your liking.

If that doesn't do the trick, just reply back here and someone in the community may be able to shed light on what else might be causing this.

We hope that this information is helpful.

​Have a great day!

Hey jdo_apple,

Is it possible that you are pressing a certain command on your keyboard that is causing the computer to lock? For example, Control + Command + Q will automatically lock your screen. Is it possible that this shortcut is something you're using in another app, which is causing that to happen? If so, you can customize your shortcuts by following the info here: Create keyboard shortcuts for apps on Mac

Cheers.