Mac System Software 4.0b4

4.0b4
Build of Mac System Software 4.x
MacOS-4.0b4-Desktop.png
Architecture68k
Compiled1987-01-12
Timebomb
Works in
AboutMacOS-4.0b4-About.png

Mac System Software 4.0b4 is a beta build of Mac System Software 4.x. This build implements support for color display.

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