System 6.0.6 'SixPack' - never released due to AppleTalk bug.
Macintosh System Software (0.7) System File 3 System Software with HD20 Support (0.5) System File 2
System 6.0.6 'SixPack' - never released due to AppleTalk bug.
Macintosh System Software (0.7) System File 3 System Software with HD20 Support (0.5) System File 2