Lock Your Screen in an Instant
Need to step away from your Mac for a few minutes and want to lock your screen? It’s easier to do than you realize. Press Control + Command(⌘) + Q, and your screen will immediately turn off. This keystroke combo works in newer versions of macOS such as macOS Catalina. If you are running an older version of macOS, you may have to try control + shift + power or even control + shift + eject if you have an optical drive.