System Software (0-6) System 1.x

In 1984 Apple Computer unveiled their Macintosh. It included a new user interface that revolutionized the way people though about computer interaction. Originally referred to as simply "Macintosh System", the underlying OS was a single-tasking disk system for the Motorola 68K CPU. Significant changes were made in MacOS 7.x.

The Macintosh originally came bundled with a Guided Tour of Macintosh, MacWrite, MacPaint, and a Tour of MacPaint and MacWrite.

Emulation note: For MacOS 0.x-6.x we recommend the vMac Mini emulator.

It is possible to write Macintosh 400k/800k images to a real disk using a Kryoflux.

Note: Wikipedia's/Apple's Developer CD Classic Mac OS "System Software" numbering scheme is GARBAGE and should NOT be used.

Other Mac OS Versions:
| 1.x-6.x | 7.x | 8.x | 9.x | MacOS X | All |


Release notes

System 1.0 (0.97), Finder 1.0 was the first official, stable release. It was released in 1984 with the original Macintosh and ran with 128k RAM, 400k 3.5" floppy drive, monochrome video, and a mouse. It used a flat file system (MFS) that only emulated folders. Officially the System revision was 1.0, but the internal number reported "0.97".

The Macintosh Guided Tour was also released with the original Macintosh, but contained an earlier System 0.85, Finder 1.0. Notably the finder still had icons of the Twiggy Macintosh!

System 1.1, Finder 1.1g improved font support, disk copying, and startup speed.

Product type
Release date
Minimum CPU
User interface
Download count
64 (13 for release)


Download name Version Language Architecture File size Downloads
Apple Mac OS (System 0.85 Finder 1.0) (Guided Tour Mac 128k) (Jan 1984) (3.5-400k) S0.85/F1.0 English 359.68KB 2
Apple Mac OS (System 1.0 (.97) Finder 1.0) (Macintosh System Disk) (Jan 1984) (3.5-400k) S1.0(.97)F1.0 English 166.81KB 2
Apple Mac OS (System 1.1 Finder 1.1g) (Lisa System Disk 1.0) (Apr 1984) (3.5-400k) (DC42) S1.1F1.1g English 3.3MB 3
Apple Mac OS (System 1.1 Finder 1.1g) (Macintosh System Disk) (Apr 1984) (3.5-400k) S1.1F1.1g English 360.63KB 5
Apple Mac OS (System 1.1 Finder 1.1g) (Macintosh System Disk) (Apr 1984) [French] (3.5-400k) S1.1F1.1g French 148.64KB 1
Apple Mac OS (System 1.1 Finder 1.1g) Manual (030-0687-B) (1984) S1.1F1.1g English 33.7MB 0
Apple Mac OS (System 1.1 Finder 1.1h) (Guided Tour Mac 128k) (Apr 1984) [French] (3.5-400k) S1.1F1.1h French 135.58KB 0


Comments by