How to Lock a Mac Screen

If you’re leaving your Mac unattended in the office or another public place, you’ll probably want to lock the Mac screen so that you have to enter the password when you return to it.

How to Lock Mac Screen Quickly

Here’s the quickest way:

  • Control+Shift+Eject is the keystroke (keyboard shortcut) for Macs with an Eject key, and for external keyboards
  • Control+Shift+Power is the keystroke (keyboard shortcut) for Macs without the eject key, like the MacBook Air and MacBook Pro Retina

Alternatively, you can setup a Hot Corner to do this – or change your System Preferences to enable this option in the ‘Security & Privacy’ section.

Why Lock Your Screen

It’s a good idea to lock your Mac screen when you away from your computer to keep your data safe, and to retain privacy. If you are in a public place such as a coffee shop, airport, public lounge, or an office, it is always a good idea to lock the Mac screen.

Doesn’t a Screensaver do the Same Thing?

Not always. Your screensaver might not keep the Mac locked. It is best to know that you have Locked the screen so that nobody else can use your computer.