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Apple today released OS X Mountain Lion, the ninth major release of the Mac operating system, offering more than 200 innovative new features for $19.99 in the Mac app store. Customers who recently purchased a Mac after June 11, 2012 will get a free upgrade.
"With iCloud integration, Mountain Lion is even easier to set up, and your important information stays up to date across all your devices so you can keep editing documents, taking notes, creating reminders, and continue conversations whether you started on a Mac, iPhone or iPad," said Philip Schiller, Apple's senior vice president of Worldwide Marketing.
New Features

Additional features in Mountain Lion include the revolutionary new Gatekeeper, which makes downloading software from the Internet safer; Power Nap, which automatically updates your apps and system while your Mac is asleep; and a faster Safari browser. New features for China include significantly improved text input, a new Chinese Dictionary, easy setup with popular email providers, Baidu search in Safari, and built-in sharing to Sina Weibo and popular video websites Youku and Tudou.
Pricing and Availability
OS X Mountain Lion is available from the Mac App Store for $19.99 (US). Mountain Lion requires Lion or Snow Leopard (OS X v10.6.8 or later), 2GB of memory and 8GB of available space.