Mac System Software 1.x

Mac System Software 1.x
Version of Mac System Software
Preliminary name
Latest build
Release date1984-01-24
Support end1985-04-01
Replaced by
Mac System Software 2.x
Macintosh 128K Twiggy

Mac System Software 1.0 was 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.

Builds[edit | edit source]

Internal Beta[edit | edit source]

Public Beta[edit | edit source]

RTM[edit | edit source]