If you want a GUI for Graphviz, there is one that's provided by Pixelglow. It uses its own built-in version of Graphviz, which is several years out-of-date. However, you can patch it so that it makes use of a newer Graphviz from one of my packages. To do this, download and install one of my Graphviz packages, then download Graphviz from Pixelglow. Drag Pixelglow's Graphviz.app to /Applications, and then open the Terminal and run this (using graphviz-devel instead of graphviz-2.12 depending on which of my packages you installed): cd /usr/local/graphviz-2.12/bin ./fix-graphviz-app "/Applications/Graphviz.app" This will permanently modify your copy of Graphviz.app to use my updated version of Graphviz. You can freely move or rename your Graphviz.app, but note that it will not function if you later uninstall my Graphviz package, or if you copy this Graphviz.app to a machine on which my Graphviz package is not installed.