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Possible Duplicate:
Is there a keystroke that can lock the Mac OS X screensaver?

Is there a keyboard shortcut for locking my screen?

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Possible duplicate of Is there a keystroke that can lock the Mac OS X screensaver? (and its many duplicates that are listed in the "Linked" section in that question). – Arjan Nov 29 '10 at 11:56
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closed as exact duplicate by Arjan, random♦ Nov 29 '10 at 19:10

This question covers exactly the same ground as earlier questions on this topic; its answers may be merged with another identical question. See the FAQ for guidance on how to improve it.

4 Answers

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Here's another way that does not require additional software: Go to System Preferences - Security - Require password immediately after sleep or screen saver begins.

You can then use ctrl-shift-eject to sleep your monitor, and a password will be required to bring it back.

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Ctrl-Shift-Eject on my Macbook Pro – Daniel Beck Nov 29 '10 at 11:10
Nice! Though in general I wouldn't recommend duplicating answers: what about posting this at Is there a keystroke that can lock the Mac OS X screensaver? too? There is some answer there that mentions the keystroke, but that is missing the actual locking. (I could edit your answer into that one, but well...) – Arjan Nov 29 '10 at 12:06
Can anyone try this on a machine without an optical disc drive (hence: on a new machine that has Eject replaced with the power button)? – Arjan Nov 29 '10 at 12:18
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up vote 1 down vote

Try Macloc, and then assign it a keyboard shortcut

About MacLoc This simple application activates the Fast User Switching feature built-in to Mac OS X. After clicking on MacLoc, it will appear that you’ve logged out, however upon entering your username and password, all open documents and applications will be right where you left them. MacLoc is the perfect solution when you need to step out of the room for a moment.

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Nice. I wonder if this also uses the same screen that Fast User Switching uses (which then actually does reveal that one is actually logged in)? (To assign a keyboard shortcut to the built-in Fast User Switching also see the duplicate questions.) – Arjan Nov 29 '10 at 16:48
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up vote 0 down vote

Here is a guide on how to do it: How to lock your Mac with a keyboard shortcut.

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up vote -1 down vote

If you're using Windows XP, press the Windows logo key + L to lock your computer.

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It's tagged with "osx", I don't think he's using Windows XP. – Daniel Elessedil Kjeserud Nov 29 '10 at 11:03
Ye gods. My bad; I so didn't even notice. I need to go to bed. – goblinbox Nov 29 '10 at 11:08
The downvote isn't mine, but: each post does have a "delete" link...! – Arjan Nov 29 '10 at 11:58
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