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Found one that quits all -- shuts down
Another quits all -- restarts

Didn't find the one you're looking for

Command-Control-Media Eject (⏏)---Quit all applications (after giving you a chance to save changes to open documents), then restart the computer

Command-Option-Control-Media Eject (⏏)---Quit all applications (after giving you a chance to save changes to open documents), then shut down the computer

keyboard shortcuts from Apple Mac OS X 10.6, OS X Lion, OS X Mountain Lion

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