Locking the screen in macOS

The default keyboard shortcut for locking the screen on macOS Mojave is Command + Control + Q. You can use these keystrokes at any time. Once you hit the command sequence on the keyboard, the current macOS user session screen will instantly lock, requiring a login to regain access to the session.

This is equivalent in functionality to the Command + L key combination in Microsoft Windows. You can also select this key combination from the Apple menu.

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