Here are all of the Mac OS X 10.5 Leopard pre-release builds that I
have.

They are all at this Mega link:
<https://mega.nz/folder/rU9CySrA#UwnnTORjINjwYVSSAj3fug>

From BetaWiki:

> Mac OS X Leopard build 9A241 is the first developer beta build of
> Mac OS X Leopard. This build was distributed to developers on DVD
> after being demoed during WWDC '06. The build looks mostly identical
> to Tiger, except for the addition of new components like Time
> Machine, WebClips, and Spaces.

> Mac OS X Leopard build 9A303 is a build of Mac OS X Leopard that is
> the last build known to be compatible with the PowerPC G3 processor.
> The user interface remains largely unchanged from build 9A241 and
> would only receive a facelift starting with build 9A410.

Build 9A321 has no entry on BetaWiki. It does not seem much has
changed from 9A303, but if an attempt is made to boot this build on a
G3, it hangs.

> Mac OS X Leopard build 9A343 is a a build of Mac OS X Leopard. This
> build mostly comprised of under the hood improvements, as the user
> interface would not see an overhaul until build 9A410.

> Mac OS X Leopard build 9A410 is a beta build of Mac OS X Leopard. It
> is the second DVD-based beta build of Leopard distributed by Apple,
> which was given out during NAB 2007. This build has much of the
> Tiger UI intact, but window decorations have been updated to the
> iTunes-like style that would be used in the final retail version of
> Leopard. The intention of this build was to allow developers to test
> the new unified UI changes before shipping updated applications.
>
> The default wallpaper used in this build is still the same as Mac OS
> X Tiger.

> Mac OS X Leopard build 9A466 is a beta build of Mac OS X Leopard.
> This build is the last DVD-based beta build of Mac OS X Leopard and
> was distributed at WWDC '07. This build marked the second revision
> of the updated iTunes-like Aqua interface that was kept until Snow
> Leopard. Most of the Tiger assets have been removed, although some
> icons are still from Tiger, as well as certain UI buttons (such as
> the window controls).

Builds 9A499 and 9A559 have no entry on BetaWiki. 9A499 seems mostly
identical to 9A466. 9A559 looks closer to the final retail, or "Golden
Master", build of Leopard.

Compatibility
Architecture: PPC x86 (Intel:Mac)

G3s up to build 9A303
Any G4 or G5
Early Intel Macs