The DiscPainter comes with a Mac OS X / Windows installation CD that installs drivers and Discus for Dymo, an application that helps you to the design the disc image. After plugging in the USB cable and restarting your Mac, the instructions take you through making your first disc.
I was underwhelmed by the Discus for Dymo software, which despite a 2007 copyright date appears to have been written while Mac OS X 10.2 was still all the rage. It has a cheesy, Aqua-like interface (see below) that looks very unprofessional and is obviously a port done by Windows programmers. My first thought was that I needed to update the software. No, version 1.1.1 IS the latest version.
Discus for Dymo does its job, but is uses many Mac OS X features incorrectly. For example, I wanted to use a picture from my iPhoto Library as a backdrop on a CD so I clicked on the Photo button expecting the standard Apple media browser to appear immediately. Instead, I had to navigate to my Photos folder before the media browser appeared.