I recently upgraded my 2018 Mac mini to macOS Catalina 10.15.6, and I’ve noticed that whenever I turn my monitors off and leave my computer, it never actually locks itself after the 10 minutes when it’s left alone. Is there any way to fix this? I can manually lock the screen and make it go to sleep but that’s kind of a pain to do every time I want to leave my computer.
Screen won’t lock after upgrading to Catalina
bugcatalinascreen-lockunlock
Related Solutions
You can do this via the command line if you can ssh into the machine, using the screencapture command.
Take a look at this question for some more info.
This is a system preference, and you change it in the Desktop & Screensaver pane of... System Preferences.
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Best Answer
Check the battery settings in the Energy Saver. You should be able to see a dial to change the time needed for your Mac to sleep. The defaults for these have been known to change from time to time, so you may be able to put it back to what it was originally.
Incidentally, locking your computer by leaving it unattended for 10 minutes is not a good security practice. If you want a quick way to lock it, see here for sleeping and here for locking. This is a habit that is worth picking up.