Dubbed Mountain Lion, the new OS will introduce features already available to iPhone and iPad users including Messages, Notes, Reminders Twitter integration and AirPlay Mirroring.
Messages will be the full-screen version of iMessage which allows mobile device users to chat for free, its introduction in Mac OS X means users will now be able to continue conversations on their laptop and desktop.
Lion users can download a beta of Messages from www.apple.com, and the final version will be available with Mountain Lion
The company says Mountain Lion is the first version of OS X built with its iCloud remote content and data storage service in mind.
It also features system-level Twitter integration
Apple is previewing the new software to developers today and says customers will be able to upgrade via the Mac App store in the summer.
“The Mac is on a roll, growing faster than the PC for 23 straight quarters, and with Mountain Lion things get even better,” said Philip Schiller, Apple’s senior vice president of Worldwide Marketing.
“The developer preview of Mountain Lion comes just seven months after the incredibly successful release of Lion and sets a rapid pace of development for the world’s most advanced personal computer operating system.”
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