Thanks, following those instructions I got it to build - I now have an application running (under the build and debug command in xcode) that seems to freeze pretty much anytim I try and do anything.

I tried to load a document and that hung, I tried to draw a quickshape and that hung to.

If there is anything I can report then let me know - but try to keep it in simple terms because I don't know anything about developing on a Mac but I would love to do anything I can to help bring my favourite drawing tool to the mac.