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  2. XNU - Wikipedia

    en.wikipedia.org/wiki/XNU

    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.

  3. macOS version history - Wikipedia

    en.wikipedia.org/wiki/MacOS_version_history

    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 ...

  4. Mac OS X Snow Leopard - Wikipedia

    en.wikipedia.org/wiki/Mac_OS_X_Snow_Leopard

    Newer Xserve and Mac Pro machines will run a 64-bit kernel by default; newer iMac and MacBook Pro machines can run a 64-bit kernel, but will not do so by default. [44] Users wishing to use the 64-bit kernel on those machines must hold down the numbers 6 and 4 on the keyboard while booting to get the 64-bit kernel to load.

  5. List of Apple operating systems - Wikipedia

    en.wikipedia.org/.../List_of_Apple_operating_systems

    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 Yosemite – 10.10 (free) OS X El Capitan – 10.11 (free) macOS Sierra ...

  6. macOS High Sierra - Wikipedia

    en.wikipedia.org/wiki/MacOS_High_Sierra

    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.

  7. macOS Catalina - Wikipedia

    en.wikipedia.org/wiki/MacOS_Catalina

    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.

  8. OS X Lion - Wikipedia

    en.wikipedia.org/wiki/OS_X_Lion

    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 operating 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.

  9. Mac transition to Intel processors - Wikipedia

    en.wikipedia.org/wiki/Mac_transition_to_Intel...

    Mac OS X Snow Leopard (10.6), released in August 2009, was the first version of Mac OS X (later macOS) to require a Mac with an Intel processor, ending operating system support for PowerPC Macs three years after the transition was complete.