Hi, this is a patch including a command to generate a graph using the dot command so you don't need the Graphviz gui program in OS X. You will need to have the dot command in your system. To do so, compile graphviz or get it from macports like so :
sudo port install graphviz
see http://en.wikipedia.org/wiki/Graphviz for more information
I've already submitted a similar patch to the maintainer "Torsten Becker" but I got no response so far so I'd like if you guys could take care of it.
Thanks
Guillaume Carbonneau