Use for questions referring specifically to versions of OS X 10.8, Mountain Lion. Non-version-specific questions related to OS X should be tagged with [osx]. Questions about Mac hardware should be tagged with [mac]. Questions about running OS X on non-Apple hardware are generally considered off-topic.
OS X (pronounced OS ten; "X" is a Roman numeral), version 10.8, codenamed Mountain Lion, is the 9th major release of Apple's Mac operating system. It was released on July 25, 2012. It is a Unix-based graphical interface operating system.
Mountain Lion is a 64 bit OS that runs on Intel-based Macs.