| Version | Codename | Date Announced | Release Date | Most Recent Version |
|---|---|---|---|---|
| Public Beta | Kodiak | September 13, 2000 | ||
| 10.0 | Cheetah | March 24, 2001 | 10.0.4 (June 22, 2001) | |
| 10.1 | Puma | September 25, 2001 | 10.1.5 (June 6, 2002) | |
| 10.2 | Jaguar | August 23, 2002 | 10.2.8 (3 October 2003) | |
| 10.3 | Panther | October 24, 2003 | 10.3.9 (April 15, 2005) | |
| 10.4 | Tiger | June 28th, 2004 | April 29, 2005 | 10.4.11 (14 November 2007) |
| 10.5 | Leopard | June 6, 2005 | October 26, 2007 | 10.5.7 (May 12, 2009) |
| 10.6 | Snow Leopard | June 9, 2008 | date not yet announced |
