If you are an EasyDCC fan (and who isn't?!), and you want to interface your command station to a Mac (or PC), you may find this video useful.

The video gives you step-by-step directions for making the custom cable required for the connection. Making the cable isn't difficult, but connecting the correct pins can be a bit tricky.

This video is located on the excellent trainmasters.tv web site. They have tons of useful content there. I highly recommend that you get a subscription to their site.