Advice getting started with parts authoring?

[N. W. Perry]

It shouldn't be the program location that the temp file is created but the location of the file you are editing. It seem that something weird is going on. If I had my MacOS machine up aand running, I'd be able to troubleshoot for you.

Ah, I see. That's OK, since the LDraw files are in that same location. And I was able to solve the error by setting permissions for myself as a user on my main drive. So that's fixed…now it's just a matter of:
   

And something tells me this is having to do with OpenGL support under Wine, so that's the next thing to look into! (That, or make a fake .exe file that actually opens the .app file of the Mac version.)