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Possible Duplicate:
How to easily shutdown OSX

Instead of showing the dreaded error message Application <X> cancelled shutdown, can I make it always force open programs to quit?

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marked as duplicate by Ƭᴇcʜιᴇ007, studiohack Mar 17 '12 at 22:00

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

Holding the power button down will turn your computer off quickly if you're in a rush.

or open a terminal window and type 'sudo shutdown -h now' and enter password. Done.

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Yes, I'm aware of that. Will it not damage components? – Dor Mar 18 '12 at 6:15
The only thing this should affect would be unsaved data. mac osx has safeguards against damaging hardware built in. – joshua.thomas.bird Apr 26 '12 at 5:36
@joshua.thomas.bird The operating system has safeguards that prevent a hardware reset from damaging hardware? What? – Blacklight Shining Sep 27 '12 at 11:08

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