OS X Mountain Lion

OS X 10.8 "Mountain Lion" is an operating system made by Apple Inc. for its Macintosh line of computers. It is a version of OS X, and carries the release number 10.8. It was released on July 25, 2012. According to Apple, "Mountain Lion" contains over 200 changes and improvements since OS X 10.7 "Lion".
History.
"OS X 10.8" was announced February 16, 2012 along with the release of an unfinished (developer preview) version for people who are signed up to its "Developer Portal". The upgrade was released to the public on the Mac App Store on 25 July, 2012 after over 5 months in beta.
Notable New Features.
Main features:
Smaller features: