Mac System Software 1.x

Mac System Software 1.0 was released on 1984-01-24 for the Macintosh now called the Macintosh 128K or Mac128K. 4 builds of 1.0 have been leaked ranging from a different GUI called "Flounder", to the Finder. Theres been some "MacSketch" prototypes all ranging from 1981 to 1983, before it was renamed to "MacPaint", but they are not leaked. The earliest leaked Mac System Software build is the Flounder 4.4 build. Apple released 1.1 with faster Disk Copy speeds and new Special menu commands. It was released on 1984-12-29.