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The first release of the new OS — Mac OS X Server 1.0 — used a modified version of the Mac OS GUI, but all client versions starting with Mac OS X Developer Preview 3 used a new theme known as Aqua. Aqua was a substantial departure from the Mac OS 9 interface, which had evolved with little change from that of the original Macintosh operating ...
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 10.6 Snow Leopard was the first version of Mac OS X to be built exclusively for Intel Macs, and the final release with 32-bit Intel Mac support. [37] The name was intended to signal its status as an iteration of Leopard, focusing on technical and performance improvements rather than user-facing features; indeed it was explicitly ...
In addition, the Mac OS X kernel has been rebuilt to run in 64-bit mode on some machines. On those machines, Snow Leopard supports up to 16 terabytes of RAM. 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]
Final version of macOS to support 32-bit hardware and software; macOS Catalina: June 3, 2019 October 7, 2019 Version 10.15; First version of macOS with only 64-bit hardware and software support; 32-bit hardware and software support dropped; Macintosh computers (x86 and ARM64) macOS Big Sur: June 22, 2020 November 12, 2020 Version 11; macOS ...
Version Build Date Darwin version Release notes Standalone download 10.13 17A365 September 25, 2017 17.0.0 Original Mac App Store release About the security content of macOS High Sierra 10.13 — 17A405 October 5, 2017 About the security content of macOS High Sierra 10.13 Supplemental Update: macOS 10.13 Supplemental: 10.13.1 17B48 October 31, 2017
macOS Monterey is the final version of macOS that supports the 2015–2017 MacBook Air, Retina MacBook Pro, 2014 Mac Mini, 2015 iMac and cylindrical Mac Pro, as its successor, macOS Ventura, drops support for those models. It is the last version of macOS that can run on Macs with 4GB of RAM.
XNU in Mac OS X Snow Leopard, v10.6, (Darwin version 10) comes in two varieties, a 32-bit version called K32 and a 64-bit version called K64. [9] K32 can run 64-bit applications in userland. [10] What was new in Mac OS X 10.6 was the ability to run XNU in 64-bit kernel space. K32 was the default kernel for 10.6 Server when used on all machines ...