Why does my MacBook Air screen lock every 2 minutes despite disabling Screen Time?

If your MacBook Air keeps locking after just two minutes, even though you’ve set it to 30 minutes, the problem is likely related to your Lock Screen settings, screen saver, or a security policy—not Screen Time itself.

Start by opening Apple menu  >> System Settings >> Lock Screen. 

Set both “Turn display off on battery when inactive” and “Turn display off on power adapter when inactive” to 30 minutes. 

Also check “Require password after screen saver begins or display is turned off” and adjust the delay to suit your needs. 

See Apple’s Lock Screen settings guide.

Next, check System Settings >> Wallpaper >> Screen Saver to make sure the screen saver isn’t set to start after two minutes. 

Then go to System Settings >> Desktop & Dock >> Hot Corners and make sure none of the corners is accidentally triggering the screen saver or locking your Mac.

Apple’s guides to Screen Saver settings and Hot Corners explain these options.

If the problem continues, check System Settings >> General >> Device Management for any configuration profiles that might enforce a shorter timeout, particularly if your Mac is managed by work or school. 

See Apple’s Device Management guide.

Once you’ve checked these settings, restart your Mac and test it again.