No. Apple computers use two main OS systems depending on the CPU. These systems are called iOS and OSX.
Macintosh is a brand name used for some Apple computers. A Macintosh, a Mac, And a MacBook Pro all use OSX. The iPhone, iPod Touch, and iPads all use iOS. iPod classics use a different OS called Pixo OS.
Apple Macintosh is the name of the line of computers. Mac OS is the name of the operating system that runs on them.
Windows is an operating system developed by Microsoft. Apple makes Macintosh computers that run Apple's own Mac OS X operating system but can also run the Windows operating system.
Apple's Macintosh computers use Apple's operating system known as OSX. The current version is OSX 10.8.#. Macintosh computers can also run the Windows and Linux operating systems, but those systems are not included in the purchase of the computer.
Mac OS
Personal computer line developed and distributed by Apple, Inc. Macintosh computers have a specialized operating system, which differentiates from Microsoft's Windows operating system. McIntosh is also a last name and a kind of apple.
The Apple Macintosh operating system is called Mac OS X.
Mac OS
Apple's iChat software only works with their Macintosh computers and is not available for computers running the Windows operating system.
The Macintosh Operating System (Mac OS) was created for, and is compatible with, Apple's Macintosh range of computers. As the Macintosh is a personal computer (PC) it can also run other operating systems such as Microsoft's Windows or various implementations of Linux.
The Macintosh Operating System (OSX and variants) is only supported on Apple Macintosh computers. There are hacks which will allow MacOS to be installed and run on PC systems, but this is not supported and may be unstable.
There are 2 major OS for Macintosh computers: the original, Mac OS 9 or earlier, which was a single threaded system. Now there is Mac OS X, a UNIX based operating system, found on later computers. Modern Intel based Macs can run Windows and Linux as well as Mac OS X.The original Apple computers, including the Macintosh had a proprietary operating system named Mac OS and ran on Motorola 68000 processors and its descendants: 68020, 68030, 68040. Starting in 1994, Macintosh starting using the IBM PowerPc processors: PowerPC 601, 603, 604, G3, G4, G5.In 2006, Apple switched to Intel processors running with Mac OS X (Macintosh Operating System version 10), an implementation of the Unix operating system.
The current operating system for Macintoshes, Mac OS X, is developed by a team of software engineers at Apple. It was built on the NeXTSTEP operating system for NeXT computers that Apple acquired when they purchased the NeXT company in 1996.
Apple's Macintosh computers use Apple's operating system known as OSX. The current version is OSX 10.8.#. Macintosh computers can also run the Windows and Linux operating systems, but those systems are not included in the purchase of the computer.