Mac OS/History

Versions of Mac OS

• System 1.0
• System 2.0
• System 3.0
• System Tools 4.0 (System 3.2, Finder 5.3)
• System Tools 5.0 (System 4.2, Finder 6.0)
• System 6.0 (Finder 6.1)
• System 6.0.5
• System 6.0.7 (buggy)
• System 7.0 (released in late 1991; integrated MultiFinder? into the basic OS)
• System 7.0.1 (introduced with LC II and Quadra series)
• System 7* (System 7 Tuner)
• System 7.1
• System 7.2
• System 7.5
• System 7.5.3
• Mac OS 7.6 (name changed because of the experimental clone? program)
• Mac OS 8.0
• Mac OS 8.1
• Mac OS 8.5
• Mac OS 8.6 (now runs on top of a microkernel; can run [Carbon API]? apps)
• Mac OS 9.0
• Mac OS 9.1
• Mac OS X 10.0 (switch to BSD-derived Darwin? kernel and new Quartz?/Aqua? GUI; includes 9.1, which it runs in a virtual machine)
• Mac OS X 10.1 (major speedups)