March 24, 2001
Mac OS X 10.0, the first public version of Mac OS X, is released. The code name for this release was Cheetah, although Apple did not start using the code names for marketing purposes until Mac OS X 10.3, Jaguar.
Mac OS X 10.0 was released for a price of US$129. It was the successor of the Mac OS X Public Beta and the predecessor of Mac OS X 10.1.