Mac OS X Leopard build 9A241

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. This build requires a Mac with a PowerPC G3, G4, or Intel processor to work. It is also one of the few builds that one can shoehorn the Classic Environment from an install of Tiger, although it’s not usable in any sense due to it stalling out when loading up.

Safari also doesn’t work out of the box on G3s, but one can manually install Safari 3.1.1 from the Safari Tiger update and it functions as normal.