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10.7: Restart Mission Control System 10.7
For whatever reason, Mission Control was acting strange and not correctly showing my desktops.

Mission Control is apparently still tied to the Dock process. So to restart it go to Terminal and type:

killall Dock

As with previous OS X version, this will restart the Dock and Expose/Mission Control. This isn't really a new hint. More of a confirmation that this technique still works in Lion.

[crarko adds: No, not new or earthshaking. But sometimes it's comforting to know that old techniques are still applicable to new features.]
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10.7: Restart Mission Control
Authored by: jazzbox on Nov 14, '11 08:55:44AM
I prefer (why kill something than can quit itself?)

osascript -e 'quit application "Dock"'

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10.7: Restart Mission Control
Authored by: simplebeep on Nov 15, '11 02:06:28PM

I agree, and I, for one, do prefer the osascript method. It's "cleaner," and we should all strive to keep our systems clean.

However, the killall method is more concise and requires no precise use of quotation marks (so it's easier for those new to the Terminal), and I've never heard of killall doing the Dock any harm.

It makes me wonder if the Dock application implements Sudden Termination---if so, using killall would actually be the preferred method for restarting it.

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10.7: Restart Mission Control
Authored by: leamanc on Nov 29, '11 09:02:55AM

In the case of the Dock, what is the difference in the end result?

I can see the case for using the osascript method with, say, Microsoft Word or Photoshop, or some other traditional application like that.

Is there some case for shutting down the Dock in a more "clean" fashion? The killall method has always seemed to work without any bad side effects. The Dock always re-launches immediately, re-reads its preferences, and all of the other apps tied to the Dock process do the same.

Is there a potential of corrupting its preferences or something? Or is it just that you prefer to take the "cleaner" route when you can? I just ask because I have always done the killall method with the Dock, and never really worried about any bad side effects.

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