Build list legend
|Version of Mac OS X|
|Architecture||i386 (beta only), x86_64|
Mac OS X Lion (10.7) is a version of the Mac OS X operating system released by Apple on 20 July 2011. This version dropped support for the x86 userland and architecture and removed Rosetta and Front Row. It introduced the Launchpad and was originally only released as an App Store update that could only be updated normally from Snow Leopard.