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macOS Big Sur (version 11) is the seventeenth major release of macOS, Apple's operating system for Macintosh computers. It was announced at Apple's Worldwide Developers Conference (WWDC) on June 22, 2020, [4] and was released to the public on November 12, 2020. [5] [4] [6] Big Sur is the successor to macOS Catalina (macOS 10.15).
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 ...
It was a free upgrade to all users running Snow Leopard or later with a 64-bit Intel processor. [217] Its changes include the addition of the previously iOS-only Maps and iBooks applications, improvements to the Notification Center, enhancements to several applications, and many under-the-hood improvements.
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 is incompatible with the mid-2007 and final models of these products.
OpenDarwin was a community-led operating system based on the Darwin system. It was founded in April 2002 by Apple Inc. and Internet Systems Consortium. Its goal was to increase collaboration between Apple developers and the free software community. Apple benefited from the project because improvements to OpenDarwin would be incorporated into ...
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]
Mac OS X 10.0 (code named Cheetah) is the first major release of macOS, Apple's desktop and server operating system. It was released on March 24, 2001, for a price of $129 after a public beta . Mac OS X was Apple's successor to the classic Mac OS .
10.4 Tiger added Spotlight search; [202] 10.6 Snow Leopard brought refinements, stability, and full 64-bit support; [203] 10.7 Lion introduced many iPad-inspired features; [66] 10.10 Yosemite introduced a complete user interface revamp, replacing skeuomorphic designs with iOS 7-esque flat designs; [204] 10.12 Sierra added the Siri voice ...