I was trying to update softwares which require to restart the computer. An error message appears saying "ical cancels restart", quit iCal and restart from the apple menu. When I click on iCal icon from the task bar, and click Quit - nothing happens. When I go to the File menu, the "Quit iCal" is greyed out. So I don't know how to force quit iCal so I can restart my computer. Any help is appreciated. Thank you.
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