macOS (/ˌmækoʊˈɛs/; previously Mac OS X and later OS X) is a series of proprietary graphical operating systems developed and marketed by Apple Inc. since 2001.

Every version of Mac OS X and macOS ever from the first to the latest macOS, plus how to tell which version you have. Mac OS X was first introduced almost 20 years ago in September 2000.

Mac OS X Snow Leopard. Highest Rated. Mac OS X Snow Leopard. By Apple.