This is probably a tough request.

Years ago LucasLearning produced a kart racing game called Star Wars Super Bombad Racing which was released for the Playstation 2. There was meant to be a Mac version which was (near-)complete, but a couple of months before it was due to be released, LucasLearning was shutdown and the game never appeared (neither did the Dreamcast or Windows versions).

I don't suppose anyone actually has a copy of that unreleased Mac game?