Mac OSX v10.0 - "Cheetah" | 435 MB
Mac OS X version 10.0, code named "Cheetah", is the first major release of Mac OS X, Applea€™s desktop and server operating system. Mac OS X v10.0 was released on March 24, 2001 for a price of US$129. It was the successor of the Mac OS X Public Beta and the predecessor of Mac OS X v10.1.
Mac OS X v10.0 was a radical departure from the previous a€?classica€? Macintosh operating system and was Applea€™s long awaited answer to the call for a next generation Macintosh operating system. It introduced a brand new code base completely separate from Mac OS 9's, as well as all previous Apple operating systems. Mac OS X introduced the new Darwin Unix-like core and a totally new system of memory management. It proved to be a rocky start to the Mac OS X line, plagued with missing features and performance issues, although it was praised for being a good start to an operating system still in its infancy, in terms of completeness and overall operating system stability.[who?] Unlike later releases of Mac OS X, the cat-themed code name was not used in marketing the new operating system.
System requirements
The system requirements for Mac OS X v10.0 were not well received by the Macintosh community, as at the time the amount of RAM standard with Macintosh computers was 64 megabytes (MB) of RAM, while the Mac OS X v10.0 requirements called for 128 MBs of RAM. As well, processor upgrade cards, which were quite popular for obsolete pre-G3 Power Macintosh computers, were not supported (and never officially have been, but can be made to work through third-party utility programs).
Supported Computers: Power Macintosh G3, G3 B&W, G4, G4 Cube, iMac, PowerBook G3, PowerBook G4, iBook (The original "Kanga" PowerBook G3 was the only G3-based Mac not to be supported by Mac OS X).
RAM required: 128 MB (unofficially 64 MB minimum)
Hard Drive Space: 1.5 gigabytes (GB)
800 MB for the minimal install
