MAC OS X By Rando.treumann Sep 13, 2000 Public Beta Kodiak Mar 24, 2001 10.0 Cheetah Sep 25, 2001 10.1 Puma Aug 23, 2002 10.2 Jaguar Oct 24, 2003 10.3 Panther Apr 29, 2005 10.4 Tiger Oct 26, 2007 10.5 Leopard Aug 28, 2009 10.6 Snow Leopard Jul 20, 2011 10.7 Lion Jul 25, 2012 10.8 Mountain Lion Oct 22, 2013 10.9 Mavericks Oct 16, 2014 10.10 Yosemite Jun 8, 2015 10.11 El Capitan