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Apple Mac Operating System OS X - code names and version numbers

Archive - Originally posted on "The Horse's Mouth" - 2008-01-01 10:54:13 - Graham Ellis

Which is the more recent? Panther or Jaguar? Is Tiger current or has it been replaced by Puma? If you get confused by these code names for Mac OS X versions ... here's a convenient table that may help you.

ReleaseCodenameRelease Date
10.0CheetahMarch 2001
10.1PumaSeptember 2001
10.2JaguarAugust 2002
10.3PantherOctober 2003
10.4TigerApril 2005
10.5LeopardOctober 2007
10.6Snow LeopardAugust 2009
10.7LionJuly 2011
10.8Mountain Lionnot yet released, 3.12


Mac OS X is Apple's Unix based operating system featuring a superb desktop; it's very fully featured, user friendly and GUI based ... but at the same time provides excellent access to the underlying Unix for those who require it.

We have Apple Mac computers available for your use on our Perl, Python, Tcl, Tk and Expect, MySQL and other training courses ... for you to use in place of (or in addition to) computers running Microsoft's Windows Vista or Linux. You'll find that we actually rather like the Macs - our tutor will be using one as his demonstration and projection system on most courses!

Update - Snowleopard (10.6) added to list, early 2009. It's not out yet, but said to be this quarter. Also said to be Intel only, so those of us with Powermacs are going to be abandoned!

Update - Snowleopard (10.6) release was August 2009.

Update - Lion (10.7) to be released in 2011.

Update - Lion (10.7) released July 2011.