Using a plotter with my MacBook

Hi,

I have a Macbook Pro 13" (2012) and a Graphtec Craft Robo cutting machine (plotter). Graphtec don't seem to support the machine directly themselves, and OSX seems to be able to only identify the machine (which I connect using USB) as a postscript printer. I have and like iDraw for Mac (which I also have for iPad).

How can I get iDraw on my Mac (or any other software on my Mac) to work with the Craft Robo?