Apple Released several Updates to it’s Mac OS X

Mac OS X 10.8.2 update

Applies to latest Macbook Pro and Macbook Air

As with the non-Retina systems, this update fixes problems where the system may hang under heavy CPU loads, but similar to the MacBook Air it addresses the problem of NetBoot not working when using an Ethernet adapter.

  • Facebook Intergration
  •  Power Nap feature to late-2010 MacBook Air machines
  • Phone number integration for both FaceTime and the Messages app.
  • Battery Improvement

Part 2 : Here

Apple Released Mountain Lion OS

What’s new :

  • iCloud support Improvement
  • Reminders
  • Notes
  • iMessage
  • Notification Center
  • Power Nap
  • Dictation
  • New Sharing features
  • Facebook ; Facebook friends will appear in Contact
  • Improved Twitter
  • AirPlay
  • Game Center
  • Gatekeeper ( similar to anti-virus )
  • Improved Safari

You can upgrade it simply by visiting Mac Store on Lion or Latest Snow Leorpard,

and availability on these Macs ( Other Spec required for the upgrade ) :

  • iMac (Mid 2007 or newer)
  • MacBook (Late 2008 Aluminum, or Early 2009 or newer)
  • MacBook Pro (Mid/Late 2007 or newer)
  • Xserve (Early 2009)
  • MacBook Air (Late 2008 or newer)
  • Mac mini (Early 2009 or newer)
  • Mac Pro (Early 2008 or newer)

For Details ; Source Official Apple Website