Rendering problem with Tulip on OSX

I have a related question on Stack Overflow (http://stackoverflow.com/questions/2...t-how-to-fix);

Basically, I'm using Tulip still, and it's now not wanting to render correctly. I'm on OSX Mavericks and I don't know what's wrong. Best if you look at the link above ^.

This question has been edited to reflect the finding that it's likely a difference between qt 4.8.5 and qt version > 5 on mac.