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Apple Macintosh 128k Development disks

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Year released:
[www].se [ftp].se [mirror].us [mirror].de (11.84 MB)
MD5: e0726dea2cb611d3bb9eeb82af2256d7
For System 1 - 5
This app works with: Mini vMac

These are the rest of the disks that came into my possession containing what appears to be internal Apple development software from the Macintosh project, and/or from the software companies that worked on the Macintosh project, in 1983. The people I acquired these disks from claimed they met in college in Cupertino in the early 1980s, while one was doing a computer science degree, and working for Apple or a closely associated company on the Macintosh project.

First upload: the rest of my disks I backed up from the real copies using my FloppyEmu + Mini Vmac on my PC, in both .dsk and Apple DiskCopy 4.2 images (.image), in one zip file.

Included are (names come from the actual disk labels):

Basic Disk
DUTalk Disk (corrupt, will not try to reimage, it is impossible to save- some things may work)
MChart Disk (corrupt, will not try to reimage, it is impossible to save- some things may work)
Pascal Disk
MacTerminal (corrupt, will not try to reimage, it is impossible to save- some things may work)
Utilities Disk

Due to life issues and other interests (such as restoring my SE further), as well as the general apathy from this community and others related to extremely early Macintosh software, I will not be taking the time to release these separately, take pictures of each disk, compress the DiskCopy images into .sit 3.5 (which requires using multiple different Windows programs and emulated utilities in Mini Vmac in a certain order and is quite tedious), etc. IF there is any interest in the disks I have from the greater Macintosh emulation community, perhaps I will reconsider and make Stuffits for use on real hardware. Regardless, I wanted to get these all into the public domain for posterities' sake.

Any software preservationalists, collectors, or otherwise interested parties may contact me concerning these disks through the contact form on my profile.

— iwakurarein


Here are my contacts' comments on the Basic disk:

Here are comments on Basic Disk.dsk:

" "MSBASIC" is a near-final build of Microsoft BASIC. The about box
describes it as version 1.00.00, created January 19, 1984, but the
version 1.00.00 in the Macintosh Garden archive has an about box date
of January 24. ResCompare shows numerous small differences in the code
of the two versions.

"BASIC" is version 0.29 of Macintosh BASIC by Apple's Donn Denman.
This new discovery is the earliest known prototype of Macintosh BASIC,
dated February 9, 1984. There's an invisible menu just to the right of
the Program menu which contains a few "Test" commands; all I've been
able to make them do is ask me "Why did you delete that stuff?" and
cause an eventual system error.

The miscellaneous MS-BASIC programs and unofficial documentation
appear to originate with the world's first Mac user group, "DUsers" of
Drexel University. There are many references to the group, specific
members, and the Philadelphia area throughout these documents."

> Can you provide any citations about DUsers being the first Macintosh user group

They're the first through an amusing technicality. Prior to the Mac's
launch, Apple contracted with Drexel to sell Macs to the students and
faculty for only $1,060 each, with all incoming freshmen required to
use one for coursework. The deal's nondisclosure clause prevented the
university from revealing anything about the machine's specs—or even
its name—before Apple announced it, so Drexel's promotional material
referred to the Mac as the "Apple DU." In the fall of '83, a group of
students visited the microcomputing program director's office, wanting
to know when the "DU" would actually be available. The meeting's
outcome was the formation of a student user group, who volunteered to
assist computing neophytes with the Apple DUs when they finally

I did mention a technicality. The May 1984 issue of Signal reports
that the Macintosh Users Group in San Francisco "was formed eight days
after the Mac was introduced by Apple. Attendance hit 80 at the
group's second meeting on March 26th." Meanwhile, the DUsers had to
wait until March 5th for their Macs to arrive at the Drexel campus,
and didn't hold their first official meeting until April (with 100
students attending).

So the first Mac-specific user group was organized before its founders
had even heard the word "Mac," let alone used one, nor did they know
anything about how it would differ from other platforms... and yet at
least one other group had formed by the time the DUsers actually
became Mac users.

Sources used to write the above:

I'm glad you got me researching this story, because the InfoWorld
article (Google Books link) solves a mystery about one of your files.
It says the Drexel group held a "MacPaint Olympics" in March 1984, and
second place went to Daniel Cogliano. His entry is recognizable as a
populated version of the MacPaint chessboard from your video, which
turns out to be of minor historical note after all. Were you able to
salvage it?

The article even explains one of the mini-games from the DUsers
MS-BASIC demo. The goal is to destroy "Prime II, also the name of the
campus mainframe students had to use for a computer course last fall.
'Everyone hated that course,' Weintraut says."

> I am guessing it is a modified version of MacTerminal that the DUusers Macintosh user group was making/using back then

Indeed, the about box says that DU Talk 1.0 (February 26, 1985) is a
modification of MacTerminal 1.1 (August 17, 1984). The article I
linked above from says that DU Talk "was given
away for free in the Korman Center." I'm pretty sure it's never
surfaced on the web before.

There's more info on page 4 of this PDF:

> One has "MacChart", I have not investigated it but it may be a prototype version of Multiplan

Microsoft Chart is a different application:

This does appear to be a prototype version of it. With ResEdit, you
can see an about box with icons of the developers' faces (DITL 271),
which is not present in the release version. However, I have not been
able to run anything on the Chart disk without crashing.


The person I have been working with and I believe the disks I've acquired to be copies of pre-release, beta software developed directly at Apple and brought by the person I got the disks from to Drexel University in early 1984. See my other releases and the comments by my contact in those.

It is probably highly unlikely that these disks are simply from the DUsers group. The people I got the disks from were telling the truth about working at Apple on the original Macintosh project. Given that they contain a ton of extremely early software unavailable on the internet anywhere, at least 10 different applications my contact has identified as being 'earliest known' or prototype versions of various games and software that were lost to time until now, and it was all on the same collection of disks. Many of these applications have surfaced individually on other disks, but this is the first time someone has found them all together on a single disk, or cache of disks.

Please see my other releases for more information and commentary from the person I have been working with.

Architecture: 68k

Mini VMac - real 68k Macintosh (Macintosh SE and below- SE/30 will not work- must be capable of booting OS 1.0 or 1.1g)


lilliputian's picture
by lilliputian - 2020, February 3 - 3:17am

Just noticed in one of the screenshots is MacTEP!

lilliputian's picture
by lilliputian - 2019, November 16 - 9:29am

Fabulous! Thank you for uploading!

Jatoba's picture
by Jatoba - 2019, November 16 - 1:47am

Invaluable upload!! Thanks!!