Apple has seeded OS X Mountain Lion 10.8.2 build 12C50 to developers. This new build comes less than a week after 10.8.2 build 12C43. 10.8.2 includes phone number syncing for iMessage and Facebook integration, making it the iOS 6 compatibility release. Tomorrow, Apple will unveil a new iPhone and provide final iOS 6 details. 10.8.2 will likely be released later this month alongside iOS 6. OS X Lion 10.7.5 build 11G54 was also seeded to developers.

This new 10.8.2 build includes release notes, making it likely that this build is either the final or close to final 10.8.2 build.

The 10.8.2 update is recommended for all OS X Mountain Lion users and includes new features and fixes. New features include:

Facebook

  • Single sign on for Facebook
  • Facebook as an option when sharing links and photos
  • Facebook friends’ contact information and profile pictures in Contacts
  • Facebook notifications in Notification Center

Game Center

  • Share scores to Facebook, Twitter, Mail, or Messages
  • Facebook friends are included in Game Center friend recommendations
  • Facebook Like button for games
  • Challenge friends to beat your score or achievement

Other new features

  • Power Nap support for MacBook Air (Late 2010)
  • iMessages sent to your phone number now appear in Messages on your Mac
  • From Safari and Mail on your Mac you can add passes to Passbook on your iPhone or iPod touch running iOS 6
  • New shared Reminders lists
  • FaceTime now receives calls sent to your phone number
  • New sort options allow you to sort notes by title, the date you edited them, and when you created them
  • Dictation now supports Mandarin, Cantonese, Spanish, Korean, Canadian English, Canadian French, and Italian
  • The Dictionary application now includes a French definition dictionary
  • Sina Weibo profile photos can now be added to Contacts

The 10.8.2 update also includes general operating system fixes that improve the stability, compatibility and security of your Mac, including the following fixes:

  • An option to discard the changes in the original document when choosing Save As
  • Unsent drafts are opened automatically when launching Mail
  • Receive Twitter notifications for mentions and replies from anyone
  • URLs are shortened when sending tweets from Notification Center
  • Notifications are disabled when AirPlay Mirroring is being used
  • SSL support for Google searches from the Smart Search Field in Safari
  • New preference to have Safari launch with previously open webpages

For detailed information on this update, please visit this website: http://support.apple.com/kb/HT5460

For information on the security content of this update, please visit: http://support.apple.com/kb/HT1222

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