Mac OS X

Mac OS X
Main article: Mac OS X

Mac OS X is the newest of Apple Inc.'s Mac OS line of operating systems. Although it is officially designated as simply "version 10" of the Mac OS, it has a history largely independent of the earlier Mac OS releases.

The operating system is the successor to Mac OS 9 and the "classic" Mac OS. It is a Unix operating system, based on the NeXTSTEP operating system and the Mach kernel which Apple acquired after purchasing NeXT Computer, with its CEO Steve Jobs returning to Apple at this time. Mac OS X also makes use of the BSD code base. There have been six significant releases of the client version, the most recent being Mac OS X 10.6, referred to as Snow Leopard. On Apple's October 20th 2010 "Back to the Mac" event,Mac OS X 10.7 Lion was previewed,showing improvements and additions including a Mac App Store.

As well as the client versions, Mac OS X has also had six significant releases as a server version, called Mac OS X Server. The first of these, Mac OS X Server 1.0, was released in beta in 1999. The server versions are architecturally identical to the client versions, with the differentiation found in their inclusion of tools for server management, including tools for managing Mac OS X-based workgroups, mail servers, and web servers, amongst other tools. It is currently the default operating system for the Xserve server hardware, and as an optional feature on the Mac Mini, as well as being installable on most other Macs. Unlike the client version, Mac OS X Server can be run in a virtual machine using emulation software such as Parallels Desktop.

Mac OS X is also the basis for iOS, (previously iPhone OS) used on Apple's iPhone, iPod Touch, and iPad, as well as being the basis for the operating system used in the Apple TV.





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