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Mac System Software 1.x
| Version of Mac System Software | |
 | |
 | |
| Version | 1.x |
|---|---|
| Architecture | 68k |
| Release date | 1984-01-24 |
| Support end | 1985-04-01 |
Mac System Software 1.x is the first version of the Mac System Software, initially released on 24 January 1984 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. Apple released 1.1 with faster Disk Copy speeds and new Special menu commands. It was released on 29 December 1984.
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