0 Mac System Software Versions

Date	Version
1984	System 0.85, 216 kbyte in size, first time with MFS file system
1985	System 2.0, updates and improvements like the Finder and menu
1986	System 3.0, contains optimizations, first time with HFS file system
1987	System 4.0, bug fixes
1987	System 4.1, improved Finder (supports HDD >32 mbyte)
1988	System 6, 32-bit color, Quickdraw support, serial port driver support, Truetype fonts
1990	System 7, 32-bit memory adressing on supported hardware, first time with virtual memory, updated GUI
1994	System 7.5
1997	Mac OS 7.6
1997	Mac OS 8.0
1998	Mac OS 8.1, 32-Bit, file system HFS+, only limited memory protection, USB and Firewire on supported hardware
1998	Mac OS 8.5.1, Sherlock search files on hard disks and on the internet, intranet updates
1999	Mac OS 8.6, multi-processor capable
1999	Mac OS 9 (sonata), Sherlock 2 can handle files with size up to 2 tbyte, user profiles (multiple users)
2001	Mac OS 9.1
1999	Mac OS X Server, Mach- Kernel 2.5 (Unix-derivated microkernel) better performance and stability
1999 March	Mac OS X Server 1.0
2000	Mac OS X Server 1.2.3
2001 March	Mac OS X 10.0 (Cheetah)
2001 Sept.	Mac OS X 10.1 (Puma), improved performance, improved GUI
2002 Aug.	Mac OS X 10.2 (Jaguar), new applications and technology
2003 Oct.	Mac OS X 10.3 (Panther), new features for improved productivity and security; Mac OS X Server 10.3
2005 April	Mac OS X 10.4 (Tiger), new technology; Mac OS X Server 10.4
2006 Jan.	Mac OS X 10.4.4, first also available vor intel based syystems
2007 Oct.	Mac OS X 10.5 (Leopard)
2009 Sept.	Mac OS X 10.6 (Snow Leopard), only for x86-64 Bit Intel dualcore