Before Mac OS X, There Was OS 1 Through 9: A History of Apple's Operating System


Photo: Wikimedia Commons

Apple has been building operating systems since 1984, when it launched the original Mac System 1.0 for its MacIntosh personal computer.Nearly 30 years of innovation has culminated in the Mac OS X Mountain Lion, which will launch this month, and iOS 6, which is coming this fall.

Mac OS System 1.0 (1984)

Mac OS System 2.0 (1985)

Mac OS System 3.0 (1986)

Mac OS System 4.0 (1987)

Mac OS System 6.0 (1988)

Mac OS System 7.0 (1991)

Mac OS 8.0 (1997)

Mac OS 9.0 (1999)

Mac OS X (2001)

And the latest version of OS X...

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