System Software (0-6) System 4.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.

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.

System 4.0, Finder 5.4 drops support for the Mac 128k. Adds support for the Mac SE. Revised Chooser and Control Panel. Adds the Trash "bulging" effect

System 4.1, Finder 5.5 drops support for the Mac 512k. Adds support for the Mac II. Adds support for hard drives over 32MB. The System Tools disk had two revisions: 2.0, and 2.0.1. The Utilities disk had three revisions: 2.0, 2.0.1, and 2.1.

Product type
OS
Vendor
Apple
Release date
1986
Minimum CPU
m68k
User interface
GUI
Platform
MacOS

Downloads

Download Name Version Language CPU File type File size
Apple Mac OS (System 4.0 Finder 5.4) (Utilities 1.0) (Jan 1987) (3.5-800k) S4.0F5.4 English m68k 3½ Floppy 307.44KB
Apple Mac OS (System 4.1 Finder 5.5) (System Tools 2.0) (Apr 1987) (3.5-800k) S4.1F5.5 English m68k 3½ Floppy 423.45KB
Apple Mac OS (System 4.1 Finder 5.5) (System Tools 2.0.1) (Aug 1987) (3.5-800k) S4.1F5.5 English m68k 3½ Floppy 526.9KB
Apple Mac OS (System 4.1 Finder 5.5) (System Tools HB-2.0) (Mar 1988) [Hebrew] (3.5-800k) S4.1F5.5 Hebrew m68k 3½ Floppy 437.39KB
Apple Mac OS (System 4.1 Finder 5.5) (System Tools J-2.0) (Dec 1987) [Japanese-Kanji] (3.5-800k) S4.1F5.5 Japanese-Kanji m68k 3½ Floppy 777.82KB
Apple Mac OS (System 4.1 Finder 5.5) (System Tools KH-1.0) (Jan 1988) [Korean-Hangul] (3.5-800k) S4.1F5.5 Korean-Hangul m68k 3½ Floppy 446.66KB
Apple Mac OS (System 4.1 Finder 5.5) (System Tools T-1.0) (Nov 1987) [Turkish] (3.5-800k) S4.1F5.5 Turkish m68k 3½ Floppy 374.8KB
Apple Mac OS (System 4.1 Finder 5.5) (System Tools YU-2.0) (Jul 1989) [Yugoslavian] (3.5-800k) S4.1F5.5 Yugoslavian m68k 3½ Floppy 361.65KB
Apple Mac OS (System 4.1.1 Finder 5.5) (System Tools AV-2.0) (Feb 1988) [Arabic] (3.5-800k) S4.1.1F5.5 Arabic m68k 3½ Floppy 459.09KB

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