It was released in by Apple Computer and was part of the classic Mac OS line of operating systems. System 6 also referred to as System Software 6 is a graphical user interface-based operating system for Macintosh computers. This pair of compilation hard drives contains a full copy of MacOS 7. Simple, powerful and a new path in computing, the Macintosh's graphics-based operating system changed the face of computing permanently. A collection of emulated software for the early Macintosh computer, created by Apple as the successor to the Apple II series. Search the history of over billion web pages on the Internet.