MacMach
Computer operating system
title: "MacMach" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["berkeley-software-distribution", "mach-(kernel)", "microkernel-based-operating-systems", "microkernels"] description: "Computer operating system" topic_path: "technology/operating-systems" source: "https://en.wikipedia.org/wiki/MacMach" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0
::summary Computer operating system ::
::data[format=table title="Infobox OS"]
| Field | Value |
|---|---|
| logo | |
| screenshot | |
| developer | Carnegie Mellon University |
| family | Unix-like |
| source model | Proprietary |
| kernel type | Microkernel |
| license | 4.3BSD, Mach 2.5 |
| working state | Discontinued |
| supported platforms | Macintosh |
| marketing target | Researchers, hobbyists |
| userland | 4.3BSD |
| ui | Command-line |
| succeeded by | MkLinux, OS X, PureDarwin |
| :: |
|name = |logo = |logo caption = |screenshot = |developer = Carnegie Mellon University |family = Unix-like |source model = Proprietary |released = |latest release version = |latest release date = |kernel type = Microkernel |license = 4.3BSD, Mach 2.5 |working state = Discontinued |supported platforms = Macintosh |marketing target = Researchers, hobbyists |package manager = |userland = 4.3BSD |ui = Command-line |succeeded by = MkLinux, OS X, PureDarwin |website = MacMach is a computer operating system from the early 1990s, developed by Carnegie Mellon University. Architecturally, it consists of Berkeley Software Distribution (BSD) 4.3 code running on the Mach 3.0 microkernel, with the Apple Macintosh System 7 running experimentally as a Mach task. The entire system runs on select Macintoshes based on the Motorola 68000 series (68k) family of microprocessors: Mac II, IIx, IIcx, IIci, IIfx, and SE/30. Its license allows personal use only, provides no commercial support, requires the user to have an existing AT&T UNIX license, and includes Apple, Inc.'s restriction against further redistribution.
In 1992, a source distribution was tested by Apple and published on CD-ROM for . Unigram/X compared it to the year-old MachTen which has universal hardware compatibility as a System 7 application.
References
References
- Thompson, Mary. (April 1994). "MacMach.demise". [[Carnegie Mellon University]].
- Williamson, Zon. (December 9, 1993). "MacMach FAQ". [[Carnegie Mellon University]].
- Megginson, David. (April 26, 1992). "MacMach".
- (September 7, 1992). "Carnegie Mellon Readies "Personal Use" $100 Mach for Mac". Unigram/X.
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