Mac OS X Mountain Lion (10.8) is the ninth and current major release of Mac OS X, Apple's desktop and server operating system for Macintosh computers.
Mac OS X Mountain Lion (version 10.8) is the ninth major release of Mac OS X, Apple's desktop and server operating system for Macintosh computers. It was released on July 25, 2012 on Apple's Mac AppStore for users running Snow Leopard and higher.
OS X Mountain Lion brings more features from the iPad and iOS devices back to OS X, including, but not limited to, Notification Center, Messages, Game Center, Reminders, Notes, GateKeeper, and integration with Twitter. It also adds support for many popular Chinese services for users in China.