Happy 7th Birthday, Mac OS X! Photos of the Apple Computer Operating System Interfaces Through the Generations

March 24th is the 7th anniversary of the official release of Apple's Mac OS X. On March 21st, 2001, Apple officially released Mac OS X 10.0 Cheetah, which was then made publicly available on the 24th. Below are the release dates and system interface images of various generations of Apple's Mac OS X: