Apple's new OS X Update is rather popular.
Apple released last week the new OS X Mountain Lion. The $19.99 upgrade has already been downloaded over three million times from the Mac App Store.
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“Just a year after the incredibly successful introduction of Lion, customers have downloaded Mountain Lion over three million times in just four days, making it our most successful release ever,” said Philip Schiller, Apple’s senior vice president of Worldwide Marketing.
Mountain Lion features include the all new Messages app, Notification Center, system-wide Sharing, Facebook integration*, Dictation, AirPlay Mirroring and Game Center. iCloud integration makes it easy to set up your Mail, Contacts, Calendar, Messages, Reminders and Notes, and keep everything, including iWork documents, up to date across all your devices.
My favorite new features include iMessage and the cool new Safari tab implementation.