Well at least the posting of the file wasn't because I was a forum newbie. Unfortunately the app won't work for most users because I am a newb in other matters.
If people don't have the sdl libs installed via MacPorts then it fails to launch. For someone who double clicks the icon expecting something they will be sorely disappointed. I'll have to figure out how to statically link the libs. The fact that I have no clue what I'm doing as far as development goes really shines through. 😢 It will still work for people who have installed the libs but just can't get a compile working.
To top it off I was wrong about the official .70 build working on PPC systems. It exhibits the same flaw it just takes a little longer. I did manage to make a universal binary though and learned how to use lipo so it wasn't a total loss.
The archive was created using Mac's right click -> create archive function. I don't know if that would be the cause or anything.
Thanks for your help Qbix and I'm sorry for wasting your time by being a newb.