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Power MachTen 4.x

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Year released:
[www].se [ftp].se [mirror].us [mirror].de
MachTen_4.0.sit (12.38 MB)
MD5: 6357fcefc7a55dcd150370e2f47f964e
For System 7.0 - 7.6 - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
MachTen_4.0_X_Window_X11R5.sit (10.64 MB)
MD5: 0f2b7bbed19118499f01e5f277bee161
For System 7.0 - 7.6 - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
MachTen_4.0_Man_Pages.sit (5.49 MB)
MD5: cc6a18ccc54fb85236a0bf7fb09d6ab8
For System 7.0 - 7.6 - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
MachTen_Updater_4.0.1b2.sit (4.17 MB)
MD5: 8398a3f71974bd72f6578061223ed6f8
For System 7.0 - 7.6 - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
MachTen-XWin_4.0.2.sit (21.99 MB)
MD5: 27089e8d2a32cf0a1d38900a341e5fc9
For System 7.0 - 7.6 - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
MachTen_4.0.3.sit (39.83 MB)
MD5: 16d9179fd2f51935a51d3ceae8597be8
For System 7.0 - 7.6 - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
power-machten414.iso (621.84 MB)
MD5: 221fd957256de078f343dad296817128
For System 7.0 - 7.6 - Mac OS 9
[www].se [ftp].se [mirror].us [mirror].de
Guides on emulating older applications

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 Apple Macintosh computers.

MachTen development started in 1989, culminating in the first release in 1991. The Professional MachTen branch, intended for 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 MachTen is no longer developed, and is functionally superseded by Mac OS X.

MachTen Commands and Utilities (Representative List):
• System Commands: csh, df, du, dump, finger, install, login, man, mt, passwd, printenv, shutdown, stty, su, supmaint, sync, time, tty, update, uptime, users, who, whoami, sh, bash, pdksh, tcsh
• File Manipulation Commands: ar, basename, cat, cd, chmod, chown, cmp, comm, cp, diff, grep, head, ls, mkdir, more,mv, od, rcp, rm, rmdir, sed, size, sort, sum, tail, tar, tee, tr, what, whereis
• Text Manipulation Commands: groff, troff, nroff, ed, eqn, emacs, ex, expand, fmt, fold, graph, plot, pr, ptx, refer, rev, spell, style, tbl, ul, vi, perl-5.004
• Process Manipulation Commands: at, init, kill, nice, ps, sleep, wait
• General Utilities: alarm, bc, cal, calendar, dc, date, echo, expr ,false, last, leave, lpd, lpr, pwd, tell, true, vacation, wall, write, yes
• MachTen Networking Applications: - Complete family of UNIX network clients and servers - biff, ftp, hostid, hostname, ifconfig, inetd, mail, named, nfsd, ping, portmap, rlogin, rmail, route, routed, rsh, rshd, rwho, sendmail, slattach, talk, telnet, tftp, tip, elm, mh, pine, procmail, upop, popclient, irc, knews, lynx, tin, xntp, uucp
• MachTen Software Development Applications: - Complete C, C++, Objective-C, Java and Ada Tools - as, cb, cc, error, f77, fpr, fsplit, gcc, gdb, g++, indent, ld, lex, lint, lorder, lxref, m4, make, md, mig, mkdep, mkstr, nm, tcopy, tp, vgrind, yacc, gnat 3.09, sisal, autoconf, automake, bison, flex, ncurses, style, p2ada
• MachTen X Window Client and Server Applications: - Complete X11R6 X server, X client and Motif development • environment - X, Xmark, afterstep, apres, asclock, bitmap, fsinfo, ico, imake, maze, mwm, nedit, playaudio, xauth, xcalc, xcolormap, xdm, xearth, xlock, xlogo, xsm, xv, xxinit, tcl, tk

Power MachTen 4.1.1
Floodgap's Power MachTen Hacking Page

See Also: Professional MachTen (68K)


MachTen 4.1.4 (DL #7) requires an activation code, which we do not possess.
If anyone knows of one and it has been tested as working, please add it to the page.


Architecture: PPC

Power Macintosh
350 MB hard disk space (minimum)


larbob's picture
by larbob - 2021, April 12 - 2:22am

While this may be the case, nobody seems to have been able to contact them in quite a while.

djsrv's picture
by djsrv - 2021, April 1 - 4:03am

Update: It appears that even though Tenon Intersystems the California corporation was dissolved, it was reorganized as a Florida LLC:

Despite the order page not working, Tenon technically still exists and filed an annual report just last month.

djsrv's picture
by djsrv - 2021, April 1 - 2:52am

Neither serial works for version 4.1.4.

unixphreak's picture
by unixphreak - 2021, April 1 - 12:52am

Can someone try this and see if they work
Machten 4.1
1-5-11-3ffff574c-243187-94-4MT (Version 4.1.4:) 1-5-11-35555826c-232147-95-4WT

djsrv's picture
by djsrv - 2021, March 31 - 1:43am

Tenon was dissolved on September 4, 2019:

Would somebody be willing to share an activation code now that the company's been defunct for a year and a half?

Jatoba's picture
by Jatoba - 2021, January 14 - 12:18am

Cameron Kaiser, author of TenFourFox himself, was also unable to reach them for a couple of years now. And shockingly, it seems a bit before then, there were plans to "open source" MachTen... wow... Sad I wonder what happened?

ClassicHasClassJanuary 7, 2021 at 3:23 PM
I have not heard anything from them in the last couple years despite a couple tries. They had voiced some interest in open-sourcing MachTen's kernel but I never heard further.

galgot's picture
by galgot - 2021, January 9 - 5:27pm

Cameron Kaiser's FLoodgap site as some very interesting pages on MachTen and building stuff on it :
Gives you an idea.
Like for building WindowMaker or GNUstep, I think you'd need XORG dev tools (and many other things), Which don't know its even in MachTen.

Jatoba's picture
by Jatoba - 2021, January 9 - 5:02pm

I see. Figured that might be the case when I saw the term "Live CD".

As for dependencies, I believe it would be possible to search for much older versions of them. But yes, without a pre-made setup, the only way to try this out would be to install them one by one and see how it goes...

galgot's picture
by galgot - 2021, January 9 - 3:54pm

I think these GNUstep live cds are build atop Linux distro, Debian. While MachTen is more based on a Unix BSD i think ? So that makes different. Maybe GNUstep could theorically be build from sources on MachTen, but that would involve building tons of more too recent dependencies and develloping tools for MachTen to handle, me think.
Even building a full GNUstep environment on a recent Linux distro is not that trivial and certainly not just "click to install", for me anyway, when i last did it 2 - 3 years ago...

Jatoba's picture
by Jatoba - 2021, January 9 - 6:01am

Incidentally, has anyone ever tried installing/using GNUSTEP 1.8 for PPC under MachTen? (CD Install here)

Not sure what the exact requirements/steps would be, if even possible, but I wonder...

MikeTomTom's picture
by MikeTomTom - 2021, January 9 - 2:12am

I emailed them near the beginning of 2020 and never got a response. I think they're totally defunct.

Yes, I also emailed them (Dec, 2020) and have had as yet, no reply.

I think that it is abandoned and that the final version above requires an activation code to be supplied.

galgot's picture
by galgot - 2021, January 3 - 8:09pm

Mmhh… tenon updates ftp page have been archived once in 2002 :
But all files seems broken :/ Too bad, there was even an SSH for XTen-6 in there.

Jatoba's picture
by Jatoba - 2021, January 3 - 2:18am

I just noticed their FTP is also dead when trying to get their OpenGL installer for MachTen, which is mentioned here. Did anyone back up "Tenon.OpenGL.Installer.hqx" while it was available? The page didn't make it sound like it was included with MachTen 4.1.x... It should be uploaded to this page if found, I think.

Tenon really seems gone, as far as I can tell.

larbob's picture
by larbob - 2021, January 3 - 1:59am

I emailed them near the beginning of 2020 and never got a response. I think they're totally defunct. I hope somebody eventually cracks it or posts a serial.

Jatoba's picture
by Jatoba - 2021, January 2 - 8:24pm

I bet they would not response if you send email to them.

I decided to test that theory out. Sent them an e-mail a week ago, asking if they still sell it, and if so, for how much, but no response. Seems abandoned to me... But maybe we should wait a bit longer.

pat's picture
by pat - 2020, December 25 - 6:07pm

The web page from Tenon Intersystems ( is dated year 2013. The purchase link does not work. I bet they would not response if you send email to them. It may considered as dead commercial.

MikeTomTom's picture
by MikeTomTom - 2020, December 19 - 2:05am

You need to go 4.1.4 to get OS 9 compatibility. But apparently vers 4.1.4 is still a $99 purchase from Tenon Intersystems, in which case we would not host a serial key for that version here.

But you'd think there would be a working one floating around somewhere.

bamdad's picture
by bamdad - 2020, December 18 - 5:43pm

thanks man. i never got 4.0.3 to work, 4.1 is much easier but alas, no registration code..

MikeTomTom's picture
by MikeTomTom - 2020, December 16 - 1:56pm

One that's known. But not tried by me and I also don't know if any of the DL's already contain it in their archives. HTH

For v4.0.3
code: 250238

bamdad's picture
by bamdad - 2020, December 16 - 2:47am

could someone pleeeease upload a license for this? this is highly intriguing stuff, and it's kind of obvious when something is abandonware if the only OS it runs on has been out of support for more than 15 years, not to mention the official site's 'order' page throws a mySQL error.. yes, i honestly wanted to buy it if the price is reasonable lol.

larbob's picture
by larbob - 2020, October 9 - 3:34am

It seems as if the serial "1-5-11-3ffff826c-232147-95-4WT" works for 4.1.4.

EDIT: no, it actually doesn't complain about it in the change license menu but complains if you try to boot again.

larbob's picture
by larbob - 2020, October 6 - 2:58am

Does anyone have a license for this? As far as I've been able to tell, Tenon is totally defunct and this is abandonware.

Jatoba's picture
by Jatoba - 2019, January 23 - 1:32am

It is an OS within a virtual machine. The virtual machine literally boots into it. Nothing about it is an emulator: it is all 100% natively run.

You can still technically call it an utility, though, if you believe we can call virtual machines in general "utilities", since they are all programs run under a host OS.

3371-Alpha's picture
by 3371-Alpha - 2017, February 25 - 7:09pm

Although this *is* an OS, a part of me wants to classify it as an emulator or utility since you can't boot into it.

Kitchen2010's picture
by Kitchen2010 - 2015, October 21 - 6:04pm

I got it from MacsRUS, I just uploaded this stuff. I checked again against what I got from him. If it is corrupt, it must have been so in his archive already. Should we remove it or does someone knows a kind of way to repair it ?

mrdav's picture
by mrdav - 2015, October 21 - 8:50am

The archive MachTen_4.0.3.sit is damaged. Error message is "The integrity of the data fork of "web2" could not be verified"

Kitchen2010's picture
by Kitchen2010 - 2015, August 31 - 10:20am

OK, I added it ! Now it is complete !

megrex's picture
by megrex - 2015, August 27 - 10:00am

Very nice work kitch. But I'm _definitely_ not going to load this one up in Sh/Sh !!
- looks like it would be tricky to get going.

Can your append your current request to MacsRUS , to include

MachTEN 4.0 îƒ.sit

he accidently missed it out from my MachTEN requests a few days ago.

Hope that's OK - Don't want to hassle him for just one file , and I haven't had chance to put together a substantial list of my own yet , Cheers.

Kitchen2010's picture
by Kitchen2010 - 2015, August 27 - 9:31am

I have added MachTen 4 from MacsRUS's archive.