This article relates to both the original "Classic" Mac OS as well as Mac OS X, Apple's more recent operating system. See the
Mac OS X article for information directly relating to this current Macintosh operating system. Mac OS is the trademarked name for a series of
graphical user interface-based
operating systems developed by
Apple Inc. (formerly Apple Computer, Inc.) for their
Macintosh line of
computer systems. The Macintosh user experience is credited with popularizing the graphical user interface. The original form of what Apple would later name the "Mac OS" was the integral and unnamed system software first introduced in
1984 with the
original Macintosh, usually referred to simply as the System software.
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