updated 01:44 pm EDT, Wed September 19, 2012
Also upgrades Game Center, FaceTime, Messages
Apple has posted OS X 10.8.2, a major update for Mountain Lion. The main addition is Facebook integration, which was originally expected at the launch of the OS. The feature allows not only quick sharing of links and photos, but also the ability to receive Facebook alerts in the Notification Center. More hooks extend into Game Center, where people can "Like" games, and use Facebook as a source for friend recommendations. Scores can now be shared to Facebook, Twitter, Mail, or Messages; friends can be challenged to beat scores and achievements.
Other changes are scattered throughout the OS. FaceTime calls and iMessages sent to a phone number will also appear on a Mac, for instance, and through Safari and Mail, passes can be sent to Passbook in iOS 6, also released today. Several new languages and dialects are supported in Dictation, such as Spanish and Mandarin, and Power Nap support has been added for the late 2010 model of the MacBook Air.
A collection of bugfixes and security updates are included, along with some minor interface tweaks. When choosing Save As a person can opt to discard changes in the original document; when launching Mail, unsent drafts are opened automatically. Twitter notifications are now generated for mentions and replies from any user, and tweets sent through the Notification Center will automatically have their URLs shortened. Notifications are moreover disabled when AirPlay Mirroring is active. Elsewhere, Safari has been upgraded with SSL support for Google searches, and the option to open previous webpages when restarting.
The v10.8.2 update is available through the Mac App Store.