OpenSim on a Mac

I finally got OpenSim running properly on my Mac. I'd been plagued by a gdiplus startup problem crashing the sim when I tried to create an object. It turns out that mono alone is not enough to replicate .Net. X11 also needs to be installed to make the gdiplus library work properly.
All I have to do now is to work out how to plug my laptop into a network socket in my teaching room and serve my sim to the class, and the job's a good 'un.