I'm never sure anymore what goes on ros-users and what goes on answers. Specifically answers seems to expect questions, not answers. I felt weird writing a report under the heading "ask a question". 

I made some progress in getting rviz to run on OSX, thanks mostly to William Woodall's ogre patch. I wrote a report on answers.ros.org, for anyone who's interested: 

http://answers.ros.org/question/256/progress-in-rviz-on-osx

The basic summary is that I got rviz compiled, and as far as the splash screen, when it quit with a segfault. 

--Nick