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Mac OS X Snow Leopard Developer Preview 2009

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Year released:
[www].se [ftp].se [mirror].us [mirror].de
Apple_Mac_OS_X_10.6_10A380.cdr (6.14 GB)
MD5: cd79fa9cc5c287f5a2960b469e3ddd81
For Mac OS X
[www].se [ftp].se [mirror].us [mirror].de
Apple_Mac_OS_X_Server_10.6_10A380.cdr (6.46 GB)
MD5: 7e664f21914b77e0ed7acee6c4e6e578
For Mac OS X
[www].se [ftp].se [mirror].us [mirror].de
Guides on emulating older applications

Limited Apple Developer Connection dual DVD release featuring Mac OS X Snow Leopard (10.6) build 10A380 with Xcode and Snow Leopard Server build 10A380.

Architecture: x86 (Intel:Mac)

Both versions require a Macintosh with an Intel processor, Westmere microarchitecture at the latest (mid 2010).

Mac OS X 10.6 requires at least 1 GB of RAM and at least 5 GB of available disk space.

Mac OS X 10.6 Server requires at least 2 GB of RAM, and at least 10 GB of available disk space.


Jatoba's picture
by Jatoba - 2020, May 16 - 9:30pm

"Chimera"... I like that. I'm already giving all sorts of nicknames to this project -- first "Snow Frankenstein", but I think "Frankenpard" has a nice ring to it, too. Smile Maybe it could be combined as "Chimera Frankenpard".

Anyway, very insightful comment. That was interesting to hear about.

Duality's picture
by Duality - 2020, May 16 - 8:25pm

One problem with beta 10.6 that will likely come up is that the concurrency APIs (Grand Central Dispatch and its kin) changed quite a bit during the betas. Definitely not the same as the GCD that shipped in 10.6.0 gold master. I am curious how much of that works on PowerPC.

The shipping GCD led to some problems with scaling Mac OS X and especially iOS (notoriously iOS 11) in later years, which led to them making much of their OS-level code less concurrent. I suspect whatever bashed-together OS comes out of that Snow Leopard on PPC effort, while fascinating, is going to be a real chimera with its own touchy performance and support issues.

Besides that, I'll admit that I was first hand not a happy customer of the SL betas at the time, compared to the Tiger and Lion betas. There was a really fun bug in SL where the mouse cursor would just lock up in the middle of your work day and you'd have to wait a couple of minutes for SL to decide you can move it again. That had some amusing Radar bug reports behind it.

Insider accounts from ex-Apple employees seem consistent with my experience, that the SL betas were a bit crash and burn.

Jatoba's picture
by Jatoba - 2020, May 16 - 7:50pm

It does open the doors for some interesting possibilities. For example, WindowShade X 5.0.7 is a SL-only app with PowerPC dependencies, and thus required Rosetta to be run. So perhaps this can now finally be run 100% processor-native after all those years. Tongue

It seems the guys involved are hacking together everything they can from all sorts of parts to get the most out of it, though, with some oogling intently at Apple's openly-provided source code to some of the missing components that are Intel-only, and apparently some frameworks etc. are universal even as far as 10.6.8, so I think this has more promise than Copland beta efforts, but I agree it is a fair comparison nonetheless.

But mainly, I wonder how many libre software apps target the 10.6 SDK at minimum, which now can be recompiled and run on PPC Macs, just like that... Smile Even if the system is unstable, it is still a cool prospect.

Also, you're right, this version here isn't what is known to be compatible, and the one from here is very likely incompatible, based on prior tests. At least based on what's here.

Duality's picture
by Duality - 2020, May 16 - 6:44pm


Of the extremely unstable Snow Leopard betas, 10A380 was one of the better ones. Certainly among the most feature complete.

I wouldn't use this or any Snow Leopard beta as a replacement for a functioning operating system, but like the Copland betas, it can be fun to try.

Jatoba's picture
by Jatoba - 2020, May 16 - 10:36am

Is this the "beta" that was used to get SL (and SLS?) running on PPC Macs very recently? Or is this different from those betas?

PrincessCake's picture
by PrincessCake - 2019, February 12 - 7:31pm

I went ahead and used the "Show Hidden Files" terminal prompt to show all the installers on the .dmg and installed the Essentials/Base files to a temp folder.

Theres not really much to look at coming from someone who still uses 10.6.8. QuickTime looks like the regular Snow Leopard version but with the old QuickTime Player 7 blue icon. As well the icons for Grand Central Dispatch/64-Bit/OpenCL don't exist anywhere inside. Mostly it looks like the release client of Snow Leopard with a few more leftover assets from Leopard.

I wonder if the build used at WWDC 2009 was released to developers? Thats where QuickTime had the purple icon.

Duality's picture
by Duality - 2019, February 12 - 6:54pm

Uploader here. I don't know, personally. It has been more than ten years since I've used this!

You could check the installer packages with the shareware Pacifist to see what's there.

The developer still accepts registrations, and he'll give you license keys for older versions if you need them.

PrincessCake's picture
by PrincessCake - 2019, February 11 - 3:12pm

Are there any interesting assets that can be extracted from this version of Snow Leopard? I'm namely looking for the purple version of the QuickTime X icon (well, the app entirely honestly as it has a different UI)

As well theres a different art asset used for the "Icon Size slider" in Finder

As a side note are the Grand Central Dispatch, 64-Bit, and OpenCL icons anywhere in this?