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OS X Lion, [5] [6] also known as Mac OS X Lion, [2] (version 10.7) is the eighth major release of macOS, Apple's desktop and server system for Mac computers. A preview of OS X 10.7 Lion was publicly shown at the "Back to the Mac" Apple Special Event on October 20, 2010.
Starting with Lion, there is no separate Mac OS X Server operating system. Instead the server components are a separate download from the Mac App Store. Mac OS X Lion Server – 10.7 – also marketed as OS X Lion Server; OS X Mountain Lion Server – 10.8 – also marketed as Mountain Lion Server
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 ...
OS X Mountain Lion (version 10.8) is the ninth major release of macOS, Apple Inc.'s desktop and server operating system for Macintosh computers. OS X Mountain Lion was released on July 25, 2012, [3] for purchase and download through the Mac App Store, as part of a switch to releasing OS X versions online and every year, rather than every two years.
Apple shortened the name to "OS X" in 2011 and then changed it to "macOS" in 2016 to align with the branding of Apple's other operating systems. [13] After sixteen distinct versions of macOS 10, macOS Big Sur was presented as version 11 in 2020, and every subsequent version has also incremented the major version number, similarly to classic Mac ...
Precursors to Mac OS X include OPENSTEP, Apple's Rhapsody project, and the Mac OS X Public Beta. macOS is based on Apple's open source Darwin operating system, which is based on the XNU kernel and BSD. [14] macOS is the basis for some of Apple's other operating systems, including iPhone OS/iOS, iPadOS, watchOS, tvOS, and visionOS.
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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". [94]