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MkLinux: The delightfully weird PowerPC Mac Linux Distro of the 1990s
Co-Developed by Apple, with Linux running as a user-mode task. Seriously.
June 01, 2023
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In 1996 -- just two years after Linux, itself, hit version 1.0 -- a version of Red Hat Linux was ported to PowerPC Macintosh computers... by Apple.

Seriously.

The very same Apple that currently opposes people running macOS on any non-sanctioned hardware -- and who fights (rather hard) to keep non-macOS systems from running on Apple hardware -- used to actively help port other systems to the Macintosh computers.  My-oh-my how times have changed.

Known as MkLinux -- short for "Micro-Kernel Linux" -- the development was a joint project between Apple and "The Open Group Research Institute" in France.  And it was a truly fascinating beast... because it wasn't quite your typical "Linux" system.

In fact, MkLinux really consisted of two different kernels:

  1. "Open Group Mach" -- a variation of the Mach microkernel which had been ported to a number of platforms, including: HP PA-RISC, x86, and (of course) PowerPC Macintosh.
  2. "Linux" -- a port of the Linux kernel itself.

What made MkLinux so strange... is that "Open Group Mach" was the lowest level kernel.  It would boot the system and provide a subset of hardware access... then "Linux" would actually be run as a task within "Open Group Mach".

A user mode task, no less!  Yes, in MkLinux... the "Linux" kernel is run as a standard, user-mode application!

Wild!

Over the years, MkLinux gained support for a number of different PowerPC Macintosh models (including some G3-based machines)... and, reportedly, had somewhere between 50,000 and 100,000 total users before eventually being all but abandoned by Apple and moving to become a small, community project.

I have personally run MkLinux on a Power Macintosh 6100 running at 66 Mhz.  Was it a speed demon?  No.  It felt quite a bit more sluggish than MacOS (7.x or 8.0) on the same system.  But, you know what?  It was a surprisingly usable Linux system!  Mostly stable, and fairly high quality!

In order to preserve some of the memory of this marvelously weird Linux "distribution", what follows is a bit of a visual tour of what using MkLinux was like on PowerPC Macs of the 1990s.

The official MkLinux website (note that it was hosted by Apple itself):

0141f1.jpg

As part of the installation process, you would place the Mach Kernel and bootloader into your Mac Extensions folder.

 

The MkLinux boot screen (a MacOS application that launched when your Mac booted... with buttons that let you choose whether to boot Mk Linux or MacOS):

Splash Screen

The MkLinux Installer!  Note this is a slightly modified version of the old Red Hat installer:

Installation Path

What kind of Mouse?  An ADB (Apple Desktop Bus) mouse, naturally!

MouseConfig Screen

Screenshot from a PowerBook 1400cs/133 running a customized MkLinux DR3 (Developer Release 3) installation:

pb1400cs-mklinux-080119-03-gif.814865

Another screenshot of MkLinux DR3:

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You can find an archive of the very first release of MkLinux on Archive.org, and a great deal of in-depth details at MkLinux.org.  Unfortunately, that site hasn't been udpated since 2009.  Just the same, the information is historically fascinating.

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"Andreas Kling creator of Serenity OS & Ladybird Web Browser" - Lunduke’s Big Tech Show - September 13th, 2023 - Ep 044

This episode is free for all to enjoy and share.

Be sure to subscribe here at Lunduke.Locals.com to get all shows & articles (including interviews with other amazing nerds).

"Andreas Kling creator of Serenity OS & Ladybird Web Browser" - Lunduke’s Big Tech Show - September 13th, 2023 - Ep 044

This made me chuckle more than it probably should have.

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I hadn't realised it's been over a year since I posted a #SundaySounds. Seems like a couple of weeks ago. Anyway, even if I live to be 100 I'll never work out how these guys weren't massive.

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Say what???

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  • That means that, within the next day or two, the massively discounted Lifetime Subscriptions will go back to their normal price. So if you wanted to snag the $89 / $99 Lifetime Sub (instead of paying $300), now’s your last chance.

  • If you are already a Lifetime Subscriber and want to be added to the 4th (or the start of the 5th) wall, email me (bryan at lunduke.com). There are only a couple of spots left on Wall 4.

  • The new Lifetime Wall designs are locked and loaded, and will make their grand debut at the end of all new shows starting either Friday or Monday.

I also wanted to take a moment to thank all of the non-Lifetime Subscribers. The Lifetime Subs may get a little extra attention at the end of the shows… but every subscriber (Monthly & Yearly) helps to make this work possible.

All of you rule.

-Lunduke

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79 Million Views in 6 Months for The Lunduke Journal

Welcome to February, all of you amazing nerds!

January was a fun month for The Lunduke Journal (thanks to all of you). For those interested in a little Inside Baseball, I’ve pulled together some stats and charts below.

The short version: Great month. Crazy news stories. Solid growth. Can’t complain!

Revamped Lifetime Wall

Oh! And the “Lifetime Subscriber Wall” is getting a “retro” facelift.

This is what the four Lifetime Walls currently look like:

 

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Each Wall now has its own, distinct look and theme. Very Retro Computer-y. You’re going to dig it.

To make that “Wall Number 5” get here as fast as possible, I’ve gone ahead an reinstated the “$89 Lifetime Subscriber” deal. But only until Wall Number 4 is full.

Want to be on the Wall? If you don’t have a Lifetime Subscription, grab one. If you already have one, email me (bryan at lunduke.com) to let me know how you want your name to be displayed.

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Now let’s look at the stats for January.

Can’t lie. I’m pleased.

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The most popular story of January, 2026:

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Image
 

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Image
 

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Over 15 million. In one month.

These are numbers that most of the big, “Main Stream” Tech Journalists could only dream of.

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They are being seen. Far and wide.

Thanks to all of you.

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