Apple has pushed out a new update to OS X Mountain Lion and it includes Facebook integration. Version 10.8.2 includes Facebook sharing into many system components and Apple apps. Users will be able to sign in to Facebook via their System Preferences and once they are the new features can be used.
Apps such as Safari, Preview and Contacts will now include a “Facebook” option in their sharing, and Apple says third-party developers will be able to create apps that exploit the feature. Sharing is also built into the Notification Center, letting you see Facebook notifications and post status updates directly from there.
OS X’s Game Center, which Mountain Lion adopted from iOS, will now let you play games against Facebook friends. You can also “Like” a game right from the Game Center.
But the most notable features, is an improved communication with iPhones and the update will make sure iMessages sent to your phone number show up on your Mac. You'll be able to take FaceTime video calls on your Mac even if they are sent to your phone number. You'll need iOS 6 for this feature as well on your iDevice.