The world’s most advanced desktop operating system gets even better.
OS X Mountain Lion is our best OS
yet. Because all these new features add up to one amazing experience on your
Mac. And every device you use.
When setting up a new Mac, getting started is even easier in Mountain Lion with iCloud. Just sign in once with your Apple ID to set up Mail, Contacts, Calendar, Messages, FaceTime, Game Center, Safari, Reminders, iTunes, the Mac App Store, and Notes.