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XNU ("X is Not Unix") is the computer operating system (OS) kernel developed at Apple Inc. since December 1996 for use in the Mac OS X (now macOS) operating system and released as free and open-source software as part of the Darwin OS, which, in addition to being the basis for macOS, is also the basis for Apple TV Software, iOS, iPadOS, watchOS, visionOS, and tvOS.
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 ...
Mac OS X 10.0 – code name Cheetah; Mac OS X 10.1 – code name Puma; Mac OS X 10.2 – also marketed as Jaguar; Mac OS X Panther – 10.3; Mac OS X Tiger – 10.4; Mac OS X Leopard – 10.5; Mac OS X Snow Leopard – 10.6; Mac OS X Lion – 10.7 – also marketed as OS X Lion; OS X Mountain Lion – 10.8; OS X Mavericks – 10.9 (free) OS X ...
macOS Catalina (version 10.15) is the sixteenth major release of macOS, Apple Inc.'s desktop operating system for Macintosh computers. It is the successor to macOS Mojave and was announced at WWDC 2019 on June 3, 2019 and released to the public on October 7, 2019.
Mac OS X Snow Leopard (version 10.6) (also referred to as OS X Snow Leopard [10]) is the seventh major release of macOS, Apple's desktop and server operating system for Macintosh computers. Snow Leopard was publicly unveiled on June 8, 2009 [ 11 ] at Apple’s Worldwide Developers Conference .
CNET rated Mac OS X 10.0, a 6 out of 10, calling it "more stable than previous Mac OSs", along with compliments on its UI, memory management and speed, but isn't "ready for the masses", due to issues such as the lack of native third-party applications for the platform, missing DVD playback and hard to use user interfaces. [18]
OS X El Capitan was released to end users on September 30, 2015, as a free upgrade through the Mac App Store. [ 6 ] OS X El Capitan is the final version of OS X to support Aluminum Macs and Xserve , as its successor, macOS Sierra drops support for the mid 2007 and final models.
OS X Mavericks (version 10.9) is the 10th major release of macOS, Apple Inc.'s desktop and server operating system for Macintosh computers. OS X Mavericks was announced on June 10, 2013, at WWDC 2013 , and was released on October 22, 2013, worldwide.