Contents 1 Classic Mac OS 1.1 System 1.0 - 4.3 1.2 System 6 1.3 System 7 1.3.1 "System" designation 1.3.1.1 Regular Systems 1.3.1.2 Performa Systems 1.3.2 "Mac OS" designation 1.4 Mac OS 8 1.5 Mac OS 9 2 Mac OS X 2.1 Mac OS X 10.0 "Cheetah" 2.2 Mac OS X 10.1 "Puma" 2.3 Mac OS X 10.2 "Jaguar" 2.4 Mac OS X 10.3 "Panther" 2.5 Mac OS X 10.4 "Tiger" 2.6 Mac OS X 10.5 "Leopard" 2.7 Mac OS X 10.6 "Snow Leopard" 2.8 Mac OS X 10.7 "Lion" 3 Failed Systems 4 Comments

Classic Mac OSEdit

System 1.0 - 4.3Edit

• System 1.0
• System 1.1
• System 2.0
• System 3.0
• System 3.1
• System 3.2
• System 3.3
• System 4.0
• System 4.1
• System 4.2
• System 4.3

System 6Edit

• System 6.0
• System 6.0.1 -- release disputed
• System 6.0.2
• System 6.0.3
• System 6.0.4
• System 6.0.5
• System 6.0.7
• System 6.0.8
• System 6.0.8L -- never officially released from Apple

System 7Edit

"System" designationEdit

Regular SystemsEdit

• System 7
• System 7.0.1
• System 7.1
• System 7.1.1 (System 7 Pro)
• System 7.1.2
• System 7.1.2P
• System 7.1.3
• System 7.5

Performa SystemsEdit

• System 7.0P1
• System 7.1P1
• System 7.1P2
• System 7.1P3
• System 7.1P4
• System 7.1P5
• System 7.1P6

"Mac OS" designationEdit

• Mac OS 7.5.1
• Mac OS 7.5.2
• Mac OS 7.5.3
• Mac OS 7.5.3L
• Mac OS 7.5.3 Revision 2
• Mac OS 7.5.3 Revision 2.1
• Mac OS 7.5.3 Revision 2.2
• Mac OS 7.5.4 -- never released
• Mac OS 7.5.5
• Mac OS 7.6
• Mac OS 7.6.1
• Mac OS 7.6.3 -- existance disputed

Mac OS 8Edit

• Mac OS 8
• Mac OS 8.1
• Mac OS 8.5
• Mac OS 8.5.1
• Mac OS 8.6

Mac OS 9Edit

• Mac OS 9
• Mac OS 9.0.2
• Mac OS 9.0.3
• Mac OS 9.0.4
• Mac OS 9.1
• Mac OS 9.2
• Mac OS 9.2.1
• Mac OS 9.2.2

Mac OS XEdit

• Mac OS X Public Beta

Mac OS X 10.0 "Cheetah"Edit

• Mac OS X 10.0.0
• Mac OS X 10.0.1
• Mac OS X 10.0.2
• Mac OS X 10.0.3
• Mac OS X 10.0.4

Mac OS X 10.1 "Puma"Edit

• Mac OS X 10.1.0
• Mac OS X 10.1.1
• Mac OS X 10.1.2
• Mac OS X 10.1.3
• Mac OS X 10.1.4
• Mac OS X 10.1.5

Mac OS X 10.2 "Jaguar"Edit

• Mac OS X 10.2.0
• Mac OS X 10.2.1
• Mac OS X 10.2.2
• Mac OS X 10.2.3
• Mac OS X 10.2.4
• Mac OS X 10.2.5
• Mac OS X 10.2.6
• Mac OS X 10.2.7
• Mac OS X 10.2.8
• mac saravana

Mac OS X 10.3 "Panther"Edit

• Mac OS X 10.3.0
• Mac OS X 10.3.1
• Mac OS X 10.3.2
• Mac OS X 10.3.3
• Mac OS X 10.3.4
• Mac OS X 10.3.5
• Mac OS X 10.3.6
• Mac OS X 10.3.7
• Mac OS X 10.3.8
• Mac OS X 10.3.9

Mac OS X 10.4 "Tiger"Edit

• Mac OS X 10.4.0
• Mac OS X 10.4.1
• Mac OS X 10.4.2
• Mac OS X 10.4.3
• Mac OS X 10.4.4
• Mac OS X 10.4.5
• Mac OS X 10.4.6
• Mac OS X 10.4.7
• Mac OS X 10.4.8
• Mac OS X 10.4.9
• Mac OS X 10.4.10
• Mac OS X 10.4.11

Mac OS X 10.5 "Leopard"Edit

• Mac OS X 10.5.0
• Mac OS X 10.5.1
• Mac OS X 10.5.2
• Mac OS X 10.5.3
• Mac OS X 10.5.4
• Mac OS X 10.5.5
• Mac OS X 10.5.6
• Mac OS X 10.5.7
• Mac OS X 10.5.8

Mac OS X 10.6 "Snow Leopard"Edit

• Mac OS X 10.6.0
• Mac OS X 10.6.1
• Mac OS X 10.6.2
• Mac OS X 10.6.3
• Mac OS X 10.6.4
• Mac OS X 10.6.5
• Mac OS X 10.6.6
• Mac OS X 10.6.7
• Mac OS X 10.6.8

The features of this version are promising more speed and better memory usage. Friday, August 28 (2009) release.

Mac OS X 10.7 "Lion"Edit

• Mac OS X 10.7.0
• Mac OS X 10.7.1
• Mac OS X 10.7.2

Failed SystemsEdit

These system were projected or even worked on before Apple officials applied the brakes; as a result, they never met the light of day.

• Copland
• Gerschwin