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MachTen

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Not to be confused with Mach 10 (disambiguation).
MachTen
DeveloperTenon Intersystems
OS familyUnix-like BSD
Working stateDiscontinued
Source modelClosed source
Latest release4.1.4
Supported platformsMacintosh: Motorola 68000, then PowerPC
Kernel typeMicrokernel
LicenseCommercial, proprietary
Official websitewww.tenon.com/products/machten

MachTen is a Unix-like operating system from Tenon Intersystems. It is based on 4.4BSD and the Mach kernel, and features the X Window System and GNU programming tools. It runs only as a classic Mac OS application program (in a virtual machine) on Macintosh computers.

MachTen development started in 1989, culminating in the first release in 1991, utilising Mach 2.5.[1] The second release of the software arrived in 1992, updated to use the Mach 3.0 microkernel and to provide X Window System facilities, although Macintosh System 7 was not supported at that time.[2]

The Professional MachTen branch, intended for Motorola 68000-based Macintoshes, ended with release 2.3. The Power MachTen branch, which is Power Macintosh compatible, lacks some of the features of Professional MachTen (including true virtual and protected memory models), but takes full advantage of the PowerPC processor and is compatible with Mac OS 9 through its final version, 4.1.4. MachTen is no longer developed, and is functionally superseded by macOS.

References

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  1. ^ "Tenon's Mach for the Mac Product Now Shipping". Unigram/X. 8 July 1991. p. 2. Retrieved 31 January 2026.
  2. ^ "Tenon Debuts Latest Mach-on-Mac System Software". Unigram/X. 13 July 1992. p. 3. Retrieved 31 January 2026.

See also

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