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Macintosh Operating System (Mac OS)

Definition - What does Macintosh Operating System (Mac OS) mean?

The Macintosh Operating System (Mac OS) is an operating system (OS) designed by Apple Inc. to be installed and operated on the Apple Macintosh series of computers. Introduced in 1984, it is a graphical user interface (GUI) based OS that has since been released as multiple different versions.

Initially, Mac OS was known as System Software.

Techopedia explains Macintosh Operating System (Mac OS)

Mac OS is considered the pioneer of GUI based operating systems, as it was launched when MS-DOS was the industry standard. Mac OS is a completely capable OS that provides functionality and services similar to Windows or Linux OS. Some of the code base and features of Lisa OS have been incorporated in Mac OS.

Mac OS is designed to operate on Apple manufactured PCs and by default, does not support x86 architecture.

As of 2012, Mac OS released several versions, including Macintosh 128k, Mac OS 7, Mac OS X and Mac Mountain Lion.

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