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 Wondering what the name of the latest macOS version is? Curious about the versions of Mac OS X that came before?

Mac OS X / macOS. OS X Server 10.7 and later are software add-ons to the base OS, and do not get their own releases.

Mac OS, Mac OS X, or macOS, is the operating system that resides on Apple's desktop and portable computer lineup. Built upon a Unix core, it is easy to use yet highly advanced, extremely stable...

Mac OS X System & Mac Software. All questions and problems related to running OS X should be posted here as well as those for miscellaneous software not more specifically...