How to Use Lock Screen in macOS Big Sur, Catalina, Mojave, & High Sierra

Mac users have long been able to use various tricks to lock the screen of their computers, but with macOS Big Sur, Catalina, Mojave (and anything from High Sierra 10.13.x onward), a simpler and faster option is now available on the Mac with an official Lock Screen feature.
With the new Lock Screen feature, you can instantly lock down a Mac through a system-wide menu option, or with a keyboard shortcut. Once Lock Screen has been enabled, a proper user login and password must be entered before the Mac can be accessed again. This is an excellent privacy and security feature, and one that Mac users should familiarize themselves with if they frequently use their computers in a public setting, be it at work, school, home, or anywhere else they may want to password protect their computer to prevent unwanted access.

















