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The history of macOS, Apple's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project to replace its "classic" Mac OS. That system, up to and including its final release Mac OS 9 , was a direct descendant of the operating system Apple had used in its Mac computers since their ...
macOS Sierra (version 10.12) [4] is the thirteenth major release of macOS (formerly known as OS X and Mac OS X), Apple Inc.'s desktop and server operating system for Macintosh computers. The name "macOS" stems from the intention to unify the operating system's name with that of iOS, watchOS and tvOS.
Mac OS X versions were named after big cats, with the exception of Mac OS X Server 1.0 and the original public beta, from Mac OS X 10.0 until OS X 10.9 Mavericks, when Apple switched to using California locations. Prior to its release, version 10.0 was code named internally at Apple as "Cheetah", and Mac OS X 10.1 was
The original operating system for the Macintosh was the classic Mac OS, which was introduced in early 1984 as System Software. In 1997, System Software was renamed Mac OS. In 1999, Mac OS X Server 1.0 was released, followed by Mac OS X 10.0, the first consumer release of the Mac OS X.
The system was launched as Mac OS X, renamed OS X from 2012—2016, [10] and then renamed macOS as the current Mac operating system that officially succeeded the classic Mac OS in 2001. The system was originally marketed as simply "version 10" of Mac OS, but it has a history that is largely independent of the classic Mac OS.
macOS High Sierra (version 10.13) is the fourteenth major release of macOS, Apple Inc.'s desktop operating system for Macintosh computers. macOS High Sierra was announced at the WWDC 2017 on June 5, 2017 [4] and was released on September 25, 2017. The name "High Sierra" refers to the High Sierra region in California.
Calendar, previously known as iCal before OS X Mountain Lion, is a personal calendar app made by Apple Inc., originally released as a free download for Mac OS X v10.2 on September 10, 2002, before being bundled with the operating system as iCal 1.5 with the release of Mac OS X v10.3. It tracks events and appointments added by the user and ...
The internal codenames of Mac OS X 10.0 through 10.2 are big cats. In Mac OS X 10.2, the internal codename "Jaguar" was used as a public name, and, for subsequent Mac OS X releases, big cat names were used as public names through until OS X 10.8 "Mountain Lion", and wine names were used as internal codenames through until OS X 10.10 "Syrah".