OS X Mountain Lion (version 10.8) is the ninth major release of OS X, Apple Inc.’s desktop and server operating system for Macintosh computers. OS X Mountain Lion was released on July 25, 2012. It gains features from iOS, such as Notes and Reminders as applications separate from Mail and Calendar, in addition to those iOS features introduced in Mac OS X Lion.
OS X Mountain Lion replaces iChat with Messages, which includes support for iMessage, allowing users to send unlimited messages to other Macs (running 10.8 or later), iPhones, iPads and iPod Touches (running iOS 5 or later). It also includes the latest version of the Safari web browser, Safari 6.
Following a soft transition started with Mac OS X Lion, Apple now consistently refers to OS X Mountain Lion as “OS X” rather than “Mac OS X”.
OS X Mountain Lion was officially announced by Apple on their website on February 16, 2012, as a successor to Mac OS X 10.7 Lion.
During the WWDC 2012 keynote on June 11, 2012, Apple announced a “near final” release version of Mountain Lion for developers, with the public version arriving in July 2012 at a price tag of US$19.99 (€15.99 in Europe, £13.99 in the UK, $20.99 in Australia and ￥128 in Mainland China). Mountain Lion achieved golden master status on July 9, 2012. It was released to the Mac App Store on July 25, 2012.