How to Lock a Mac Computer

This wikiHow teaches you how to secure the screen on your Apple desktop or laptop computer, preventing others from accessing your files and data. Open the Apple Menu. Do so by clicking on the apple icon in the upper-left corner of the...

Part 1 of 2:

Requiring a Password

  1. images 1 of How to Lock a Mac Computer
    Images 1 of How to Lock a Mac Computer
    Open the Apple Menu. Do so by clicking on the apple icon in the upper-left corner of the screen.
  2. images 2 of How to Lock a Mac Computer
    Images 2 of How to Lock a Mac Computer
    Click on System Preferences. It's near the top of the drop-down menu.
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    Images 3 of How to Lock a Mac Computer
    Click on Security & Privacy. It's a vault icon near the top of the dialog box.
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    Images 4 of How to Lock a Mac Computer
    Click on General. It's a tab at the top of the dialog box.
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    Images 5 of How to Lock a Mac Computer
    Click the padlock icon. It's in the lower-left corner of the dialog box.
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    Images 6 of How to Lock a Mac Computer
    Enter an admin username and password. If you haven't set a password for your Mac, follow these instructions to do so.
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    Images 7 of How to Lock a Mac Computer
    Check "Require password." It's near the top of the dialog box.
  8. images 8 of How to Lock a Mac Computer
    Images 8 of How to Lock a Mac Computer
    Click on the drop-down menu next to "Require password."
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    Images 9 of How to Lock a Mac Computer
    Click on immediately. It's the first option in the drop-down menu.
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    Images 10 of How to Lock a Mac Computer
    Click on the Apple Menu. It's in the upper-left corner of screen.
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    Images 11 of How to Lock a Mac Computer
    Click on Sleep. It's near the bottom of the drop-down menu. Your Mac will go to sleep and you'll have to enter your password to access it again.
    1. You'll also have to log-in with your password anytime you power on or restart your Mac.
Part 2 of 2:

Using the Keychain Shortcut

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    Images 12 of How to Lock a Mac Computer
    Go to Finder. Do so by clicking on the dark and light blue, square icon that contains a smiley face, or by clicking on the background image on your desktop.
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    Images 13 of How to Lock a Mac Computer
    Click on Go. It's in the menu bar at the top-left part of the screen.
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    Images 14 of How to Lock a Mac Computer
    Click on Utilities. It's near the bottom of the drop-down menu.
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    Images 15 of How to Lock a Mac Computer
    Scroll down and double-click on Keychain Access. It's next to a keychain icon.
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    Images 16 of How to Lock a Mac Computer
    Click on Keychain Access. It's in the menu bar in the top-left corner of the screen.
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    Images 17 of How to Lock a Mac Computer
    Click on Preferences. It's near the top of the drop-down menu.
  7. images 18 of How to Lock a Mac Computer
    Images 18 of How to Lock a Mac Computer
    Click on General. It's a tab at the top of the dialog box.
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    Images 19 of How to Lock a Mac Computer
    Check "Show keychain status in menu bar." It's near the top of the dialog box.
    1. A padlock icon will appear on the right side of the menu bar at the top of the screen.
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    Images 20 of How to Lock a Mac Computer
    Click on the padlock icon. It's on the right side of the menu bar at the top of the screen.
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    Images 21 of How to Lock a Mac Computer
    Click on Lock Screen. It's at the top of the drop-down menu. The screen will go to sleep, and you'll have to enter your log-in password to access your Mac.
    1. Use this shortcut anytime you want to quickly lock your Mac.
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