If you run Parallels make sure to max out your ram. 2-3GB is not enough. Partworks ran ok on my first generation Macbook. If you want to do this for design software it is worth a try. Otherwise I agree with the other posts that your better off going with windows system to control the Shopbot.
Get a good lower cost PC to run the ShopBot. Spend a little bit more if you have to. Make sure you do it right the first time. I am using a refurbished dell optiplex right now but I am planning on switching it out for a gaming PC I built a few years ago. While it is overkill, I know it will be far more reliable than the Dell. You don't need anything fancy to run the shopbot, but you also don't want to control a $14,000 piece of equipment with the cheapest PC you can find. Avoid low cost peripherals that come bundled with refurbs. Throw them away and buy a name brand keyboard and mouse. I had a whole slew of USB problems caused by a cheap USB keyboard.
I used to run partworks via parallels. I ended up buying a $400.00 Dell laptop when I bought Aspire since that was beyond what my older macbook could handle. The Dell is ok but I wouldn't buy another. Then again I am not really sure if you could do better with any of the other brands. With laptops you get what you pay for. For now I have to satisfy my apple needs with my iPhone.
As far as desktops up to a certain price point your better buying new, or refurbished. I prefer to build my own systems but when you can buy a low end PC for the same price as a retail copy of windows 7, building one is not practical. However any more than $500 or so building your own is the only way to go as far as I am concerned. I just like to build computers though
Michael Schwartz - Waitsfield VT
Shopbot prs standard 48x96. Aspire. SB Link.