Mac OS X did come out in 1999, as Mac OS X Server 1.0 (March 16, 1999), a developer preview of the desktop version, and as Darwin 0.1. Mac OS X beta was released on September 13, 2000. At the time of this writing, Mac OS X has seen four major releases: 10.0 ("Cheetah", March 24, 2001), 10.1 ("Puma", September 29, 2001), 10.2 ("Jaguar", August 13, 2002), and 10.3 ("Panther", October 24, 2003).
