For those interested in doing UML on Mac OS X,
Object Domain is an incredible tool and it comes with a nice ZeroG installer which creates an .app for it and everything. The problem is, it doesn't work by default. I had to slug through this since the previous "beta" expired and I had to upgrade. Just in case anyone else needs it, to get it to work you need to edit the file:
/Applications/Domain30/domain.app/Contents/Resources/MRJApp.properties
And add a line that says:
<BLOCKQUOTE><font size="1"face="Geneva, Verdana, Arial">code:</font><HR><pre><font size=1 face=courier>install.root=/Applications/Domain30</font>[/code]
Note that if you install the program anywhere else, the paths will have to change.