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
AppleShare 1.0 3.3 5.4 - - January 1987
AppleShare 2.0 3.4 6.1 - - 1988
2.0 4.0 5.4 - 3.3 March 1987
2.0.1 4.1 5.5 - 4.0 April 1987
5.0 4.2 6.0 1.0 5.0 October 1987
5.1 4.3 6.0 1.0 5.1 November 1987
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 May 13, 1991
6.0.8L 6.0.8L 6.1.8 6.0.8 7.0 March 23, 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
10.0Cheetah
10.1Puma
10.2Jaguar
10.3Panther
10.4Tiger
10.5Leopard
10.6Snow Leopard
10.7Lion
10.8Mountain Lion
10.9Mavericks
10.10Yosemite
10.11El Capitan
10.12Sierra
10.13High Sierra
10.14Mojave
10.15Catalina
11Big Sur
12Monterey
13Ventura
14Sonoma

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.