Mac System Software 4.2a4

4.2a4
Build of Mac System Software 5.x
MacOS-4.2a4-Desktop.png
Architecture68k
Compiled1987-08-07
Timebomb
Works in
AboutMacOS-4.2a4-About.png

Mac System Software 4.2a4 is an early build of Mac System Software 5.x, which was leaked on 12 September 2022.

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