Mac OS Version Matrix

Pre-System 7 Versions

"Unified" System Finder MultiFinder LaserWriter Release Date
Guided Tour .85 "1.0" - - December 1983
Mac Software .97 / "1.0" 1.0 - - January 24, 1984
0.1 1.1 1.1g - - May 5, 1984
0.3 2.0 4.1 - - April 1985
0.5 2.1 5.0 - - September 1985
0.7 3.0 5.1 - - January 1986
1.0 3.1 5.2 - 1.1 February 1986
1.1 3.2 5.3 - 3.1 February 1986
2.0 3.3 5.4 - 3.1 January 1987
AppleShare 2.0 3.4 6.1 - - ?
2.01 4.0 5.4 - 3.3 March 1987
2.1 4.1 5.5 - 4.0 April 1987
5.0 4.2 6.0 1.0 5.0 ?
5.1 4.3 6.0 1.0 5.1 ?
6.0 6.0 6.1 6.0 5.2 April 1988
6.0.1 6.0.1 6.1 6.0.1 5.2 September 19, 1988
6.0.2 6.0.2 6.1 6.0.1 5.2 1988
6.0.3 6.0.3 6.1 6.0.3 5.2 March 7, 1989
6.0.4 6.0.4 6.1.4 6.0.4 5.2 September 20, 1989
6.0.5 6.0.5 6.1.5 6.0.5 5.2 March 19, 1990
6.0.6 6.0.6 6.1.6 6.0.6 5.2 October 15, 1990
6.0.7 6.0.7 6.1.7 6.0.7 5.2 October 16, 1990
6.0.8 6.0.8 6.1.8 6.0.8 7.0 April 1991
6.0.8L 6.0.8L 6.1.8 6.0.8 7.0 1992

Apple itself tends to use the "Unified" numbering scheme (the first column) to refer to system versions, while most Mac fanatics use the version number of the System file itself (the second column).

System 7 and Mac OS Classic Versions

System Finder LaserWriter
7.0 7.0 7.0
7.0.1 7.0.1 7.0
7.0.1P 7.0.1P 7.0
7.1 7.1 7.1.2
7.1P 7.1P 7.1.2
7.1P1 7.1P 7.1.2
7.1P2 7.1P 7.1.2
7.1P3 7.1P 7.1.2
7.1P4 7.1P 7.1.2
7.1P5 7.1P 7.1.2
7.1P6 7.1P 7.1.2
7.1.1 / 7.1 Pro 7.1.3 7.1.2
7.1.2 7.1.4 7.1.2
7.1.2P 7.1.4 7.1.2
7.5 7.1.4 7.2, 8.1.1
7.5.1 7.5.1 8.2
7.5.2 7.5.3 8.2.2
7.5.3 7.5.5 8.3.3
7.5.3L 7.5.5 8.3.3
7.5.3R2 7.5.5 8.3.4
7.5.3R2.1 7.5.5 8.3.4
7.5.4 7.5.5 8.3.4
7.5.5 7.5.5 8.3.4
7.6 ? ?
7.6.1 ? ?
8.0 ? ?
8.1 ? ?
8.5 ? ?
8.5.1 ? ?
8.6 ? ?
9.0 ? ?
9.0.2 ? ?
9.0.3 ? ?
9.0.4 ? ?
9.1 ? ?
9.2 ? ?
9.2.1 ? ?
9.2.2 ? ?

Mac OS X Versions

Version Code Name
10.0 Cheetah
10.1 Puma
10.2 Jaguar
10.3 Panther
10.4 Tiger
10.5 Leopard
10.6 Snow Leopard
10.7 Lion
10.8 Mountain Lion

Apple, Mac, Mac OS, Mac OS Classic, Mac OS X, System 7, System, Finder, MultiFinder, LaserWriter, AppleShare, Cheetah, Puma, Jaguar, Panther, Tiger, Leopard, Snow Leopard, Lion, Mountain Lion are trademarks or registered trademarks of Apple, Inc.