OSX 10.8 mountain lion update 10.8.2 is available now , update containing many new features including support for newly launched iOS and iphone 5

- iMessages sent to your phone number now appear in Messages on your Mac*
- You can now add passes to Passbook (on your iPhone or iPod touch) from Safari and Mail on your Mac*
as we posted facebook support was available on dev release of 10.8.2 and now Facebook support landed with single sign on and games and other social features in final update
- Single sign on for Facebook
- Adds Facebook as an option when sharing links and photos
- See Facebook friends’ contact information and profile pictures in Contacts
- Facebook notifications now appear in Notification Center
see the full list of changes here http://support.apple.com/kb/HT5460 this update is also containg many bug fixes and security updates see the secuirty updates info here : http://support.apple.com/kb/HT1222
Download os x 10.8.2 combo update ( offline ) : http://support.apple.com/kb/DL1581