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Mac OS X Developer Previews

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[www].se [ftp].se [mirror].us (490.24 MB)
MD5: c563cab1e3439b3864a36fb4eae57372
For Mac OS X
[www].se [ftp].se [mirror].us (459.19 MB)
MD5: e3b2e8b811ef1943bbd5c1a2bf8728ab
For Mac OS X
[www].se [ftp].se [mirror].us (474.03 MB)
MD5: 6f73aa9a9985eca816919acf316aac16
For Mac OS X
[www].se [ftp].se [mirror].us (440.30 MB)
MD5: 7793ed1059027f2ae2cb51c70e214479
For Mac OS X
Guides on emulating older applications

These are the Developer Previews (not the public beta) of Mac OS X 10.0. These preview versions of the system were made available to developers only, from between May 1999 and May 2000.

In DP1 and DP2, OS X looks very similar to Mac OS 9, with distinct OPENSTEP elements. With DP3, Apple introduced the first version of Aqua, which evolved with every new beta version of the OS.

You can find more screenshots at

Alternative Downloads Page (WinWorldPC)
Mac OS X Developer Preview disk downloads as .7z compressed archives.
Architecture: PPC PPC (Carbonized)

Requires a G3 or G4 Macintosh capable of booting Mac OS's 8.6 to 9.0.4 (using hardware & systems current at time of development).

If extracting the above .zip DL's on a native classic Mac OS system; Use MacZip to extract & Toast to mount, or burn the .iso images to CD. Note: These .iso's do not mount if using the Virtual CD/DVD Utility.

System Requirements:


os9er's picture
by os9er - 2020, May 7 - 6:51pm

Jatoba: I noted the use of the Platinum interface design before; it is indeed interesting how Rhapsody-like the first two DPs are... DP1 in particular seems to be Rhapsody without very many, if any, major changes.

Jatoba's picture
by Jatoba - 2020, April 17 - 2:04pm

Wow, only now did I learn there was anything between Mac OS X Server 1.2v3 and the Mac OS X Public Beta. And I certainly didn't expect to see the Platinum look for the first two Developer Previews. Awesome!

It would be interesting to see a list of differences between Mac OS X 1.2v3 and Mac OS X DP1 and DP2, and see how "Rhapsody" they are.

bringbackaqua's picture
by bringbackaqua - 2020, February 10 - 11:56am

does anyone have a qemu image of dp3? or can they make one and upload it here please?

os9er's picture
by os9er - 2017, October 26 - 9:06pm

DP1 apparently looks and functions a lot like Rhapsody 1.0-1.2... It's a rather striking resemblance.

I also have a question: Would any of these run on a 500 MHz PBG3 Pismo? I was thinking only DP4 would, because AFAIK the Pismo series can't run anything older than Mac OS 9.0.2.

themacthing's picture
by themacthing - 2017, August 14 - 5:45pm

are these images no good?

MikeTomTom's picture
by MikeTomTom - 2016, December 12 - 11:41pm

Thanks Troyd - that was quick Smile

What I'll do now is repackage the original .ISO's unmodified, but repackaged into StuffIt 5.5 ".sit" archives for better classic Mac compatibility.

[Edit] Adding .iso's now. Had to use zip, as StuffIt didn't compress these sufficiently.

...and done.

Troyd's picture
by Troyd - 2016, December 12 - 11:37pm

From memory, I think at least the first couple of DPs were Rhapsody based, which means there was a small helper OS8/9 partition to boot from as Mac firmware only supported booting from HFS volumes and the bulk of the install was in a hidden UFS partition.

I downloaded DP1 from your link and the original form WWPC. What is missing from your zipped archive are a whole load of disks, such as Apple_Driver_ATAPI, Apple_Patches etc and the largest one, Apple_UFS weighing in at 526.4MB once unzipped.

Try mounting the WWPC version and look at it in Terminal with the command diskutil list and you will see the missing disk slices when compared with your archive once mounted.

MikeTomTom's picture
by MikeTomTom - 2016, December 12 - 10:53pm

I've added the disks to the internal server. I converted the WinWorldPC originals to Virtual CD/DVD Utility friendly disk images (double-click to mount if using the utility). Original Date and Time stamps are preserved OK.

However, there is a huge file-size difference between the WWPC .iso's and the resulting zipped .iso's above.

I was unable to detect any (other) hidden partition on the WWPC originals to explain the size differences. I tested for this using Mac, Windows & Linux systems.

I can't explain why the WWPC originals are so huge in comparison, so I'm hoping that someone is able to test any of the above zipped archives out on suitable hardware. i.e.; Install one onto a G3 or G4 to see if there is anything missing here that I can't detect. Protocol 7?? Glasses

I'm guessing the Preview 4 disk will be the easiest to set up from.

taylordesign's picture
by taylordesign - 2016, December 3 - 11:18pm

Why aren't these copied/stored at Macintosh Garden? Should someone do that instead?

os9er's picture
by os9er - 2016, December 3 - 9:58pm

Please re-do the download links, all of them now go straight to the WinWorld Software Library page.

MikeTomTom's picture
by MikeTomTom - 2015, October 27 - 10:13pm

  ...the download link for DP3 seems to give DP2.

The URL for DP3 is now fixed.

IIGS_User's picture
by IIGS_User - 2015, March 21 - 5:05pm

but the download link for DP3 seems to give DP2.

Seems so, but I think you simply must replace the 2 by a 3 in the URL before downloading the file.

bunnspecial's picture
by bunnspecial - 2015, March 20 - 11:26pm

I downloaded all four, but the download link for DP3 seems to give DP2.

Laurier's picture
by Laurier - 2015, March 1 - 9:26am

Screenshots 2,3,4 should be reupload,i was just curious to see what those Developer previews look like.

SwedeBear's picture
by SwedeBear - 2015, March 1 - 12:12am

Nope. There are more for OS X; for example BetterZip and The Unarchiver. Both capable of handling 7zip. BetterZip being the better one IMHO.

os9er's picture
by os9er - 2015, February 28 - 4:43pm

Or at least on a Mac theyʻre the only ones.

os9er's picture
by os9er - 2015, February 28 - 4:42pm

Itʻs a 7-Zip archive, and the applications mentioned in my previous comment are the only ones that can open that type of archive, so I donʻt know Sad

Troyd's picture
by Troyd - 2015, January 2 - 12:41pm

Not obviously. I downloaded DP4 and opened it on Win 7 using WinRAR. It decompressed without error. Might be a truncated download on your side. Try downloading again using a download manager.

os9er's picture
by os9er - 2015, January 1 - 5:29pm

Download link for DP4 is broken; I downloaded it, tried to open it with both 7zX and Ez7z (I have an Intel iMac),and it didnʻt work with either of those applications. 7zX gave an error saying "Cannot open file as archive"; Ez7z gave me an error saying "There is no such archive" Sad So, obviously the file was not archived properly.

os9er's picture
by os9er - 2014, March 18 - 8:31pm

I like the screenshots Smile

max1zzz's picture
by max1zzz - 2014, February 16 - 6:56pm

i wouldn't think winworld really cares, there main reason for existence is to wind up the die hard betaarchive users (their server is practically a carbon copy of betaarchive's)

However i don't know how safe the links are, they did announce they where shutting down a while back, but it never seemed to happen

Protocol 7's picture
by Protocol 7 - 2014, February 16 - 12:55pm

Does anyone?

IIGS_User's picture
by IIGS_User - 2014, February 16 - 9:55am

Do they like direct downloads linked from other sites?

DavidMon's picture
by DavidMon - 2014, February 15 - 11:34pm

hi all

i have reupload the link i found from it is in .7z

thanks David

Dog Cow's picture
by Dog Cow - 2013, February 19 - 1:43am

Yes, of course we should upload it to another file sharing site that's just going to disappear or flake out like all the others.

espectalll123's picture
by espectalll123 - 2013, February 17 - 11:21pm

Also, torrents aren't very common here... :/

espectalll123's picture
by espectalll123 - 2013, February 17 - 11:20pm

OK... so torrent? Or there's another server fast and with no registering required?

IIGS_User's picture
by IIGS_User - 2013, February 16 - 7:58pm

Nice to know, thanks. Smile

SwedeBear's picture
by SwedeBear - 2013, February 15 - 9:43pm

Ah, as we're speaking Mega works on Firefox with a plug-in. Just a tip. Wink

IIGS_User's picture
by IIGS_User - 2013, February 15 - 6:04pm

MEGA is only compatible to Chrome which is not installed by all users.

espectalll123's picture
by espectalll123 - 2013, February 15 - 4:24pm

Hey, just more than a year since last time!!!

OK... do we upload it to MEGA, own server or just torrent? Now I have a fast Internet to upload the images Smile

Protocol 7's picture
by Protocol 7 - 2011, December 7 - 3:45pm

They'll work on a B&W G3 for sure. Not sure about beiges. They'll probably run on iMacs that were made before the DP releases. Any later models (like my Summer 2001 one) won't run them.

xy's picture
by xy - 2011, December 7 - 11:14am

Does anyone know whether these previews run on every G3 Mac? Or are there restrictions as with Rhapsody?

Protocol 7's picture
by Protocol 7 - 2011, December 6 - 6:39pm

DP2 was my favourite.

Considering the size it's probably better to upload these somewhere else rather than hotlinking them from winworldpc however.

espectalll123's picture
by espectalll123 - 2011, December 6 - 5:50pm

Well... This is my first page at Macintosh Garden. I hope you like this post Smile

lilliputian's picture
by lilliputian - 2011, December 6 - 5:44pm

How fascinating!