System Software 6
Operating system
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System 6 is the sixth major release of the classic Mac OS operating system for Macintosh computers, made by Apple Computer. It was released in 1988. It is a monolithic operating system, with cooperative multitasking based on an improved... Wikipedia
Initial release date: April 1988
Developer: Apple
License: Proprietary software
Latest release: 6.0.8 / May 1991; 32 years ago
OS family: Macintosh
Released to manufacturing: April 1988; 36 years ago
Source model: Closed source