Apple has released a promotion video featuring OS X Mountain Lion to be released in July.
Mountain Lion introduces more than 200 innovative features, including the new Messages app, Notification Center, system-wide sharing, Facebook integration, Dictation, Power Nap, AirPlay Mirroring, Game Center, and the enhanced security of Gatekeeper. With iCloud built into the foundation of OS X, Mountain Lion makes it easier than ever to keep your content up to date across all your devices.
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The video below is a great way to learn about the new OS X Mountain Lion features.