Mac OS X

Mac OS X is a line of graphical operating systems developed, marketed, and sold by Apple Inc.. Mac OS X is the successor to the original Mac OS, which had been Apple's primary operating system since 1984. Unlike its predecessors, Mac OS X is a Unix-based graphical operating system. The most recent version of Mac OS X is Mac OS X 10.6 "Snow Leopard", and the current server version is Mac OS X Server 10.6. On October 20, 2010, at a keynote event held at Apple's headquarters in Cupertino, CA, Apple announced Mac OS X 10.7 "Lion", which is slated for arrival in the summer of 2011.