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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 introduction in 1984. However, the current macOS is a UNIX operating system built on technology that had been developed at NeXT from the 1980s until Apple purchased the company in early 1997.
At macOS's core is a POSIX-compliant operating system built on top of the XNU kernel, [81] (which incorporated large parts of FreeBSD kernel [14]) and FreeBSD userland [14] for the standard Unix facilities available from the command line interface. Apple has released this family of software as a free and open source operating system named Darwin.
On May 18, 2010, the MacBook was refreshed with a faster processor, a faster graphics card, improved battery life, and the ability to pass audio through the Mini DisplayPort connector. On July 20, 2011, the MacBook was discontinued for consumer purchases, but was still available to educational institutions until February 2012.
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 .
Macworld stated that Lion was a "radical revision", praising the changes made to the operating system to be more user friendly to new Mac users who are familiar with the iOS interface, while criticizing the limited utility of the interface. Ultimately, the magazine considered Lion an operating system worth getting, giving it 4.5 out of 5 stars.
The original operating system for the Macintosh was the classic Mac OS, which was introduced in early 1984 as System Software. In 1997, System Software was renamed Mac OS. In 1999, Mac OS X Server 1.0 was released, followed by Mac OS X 10.0, the first consumer release of the Mac OS X.