Lock screen occasionally does not show up on BigSur

I use combination CTRL+SHIFT+PowerButton or just close the lid of my macbook to lock the screen.


It used to work great, and it still works but not great. Sometimes either of methods don't trigger lock screen, which ruins the idea of locking itself. One day I will find out that some just opened my laptop and get all the data from it.


macOS BigSur 11.2.1 (20D74)

MacBook Pro 15″, macOS 11.2

Posted on Apr 8, 2021 7:50 AM

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Posted on Apr 8, 2021 10:20 AM

Reset  SMC:   How to reset the SMC of your Mac - Apple Support   Choose the appropriate method.


Startup in Safe mode. https://support.apple.com/en-gb/HT201262

To leave Safe Mode, click  in the menu bar and choose “Restart”

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Lock screen occasionally does not show up on BigSur

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