I have a both a Mac system and a PC, but I haven't turned the PC on for about three months and the last time I did I wondered why I even keep it.
Using Easy Draw Software on the Mac makes drawing Intarsia patterns a snap, nothing could be simpler.
However, that said, I think all Apple products are over priced as well as upgrades, such as extra memory and etc. It's really hard to justify the additional costs associated with the Mac. If it wasn't for the time saved in producing designs I couldn't.