How to turn off Facebook notifications on Mac OS X Mountain Lion?
Open System Preferences, select the Notifications preference pane at the top right, and disable it there.
Option+Click the Notification Center menu bar icon, it will turn grey when disabled To re-enable Notifications, just option+click the menu bar icon again. It will turn black to signify that it’s active again.
If you’re less of a keyboard fan and more of a gestures person, you can also hush notifications directly from the panel itself.
protected by Community♦ Jan 17 '13 at 22:45
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