System 1

First version of Apple Macintosh operating system / From Wikipedia, the free encyclopedia

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The Macintosh "System 1" is the first version of Apple Macintosh operating system and the beginning of the classic Mac OS series. It was developed for the Motorola 68000 microprocessor. System 1 was released on January 24, 1984, along with the Macintosh 128K, the first in the Macintosh family of personal computers. It received one update, "System 1.1" on December 29, 1984, before being succeeded by System 2.[1]

Quick facts: Developer, OS family, Source model, Released ...
Macintosh "System 1"
Version of the classic Mac OS operating system
The original "System 1" desktop
DeveloperApple Computer
OS familyMacintosh
Source modelClosed source
Released to
January 24, 1984; 39 years ago (1984-01-24)
Latest release1.1 / (1984-01-24) (1984-12-29)January 24 – December 29, 1984
(11 months and 5 days)
Kernel typeMonolithic
Succeeded bySystem 2
Support status
Architectural, unsupported