If I was planning to use it often I suppose I'd have to look at installing Parallels so I could run Windows without rebooting, but it will be a once in a blue moon thing so I think I'll go with the less convenient option and save the money.
Later - and it looks like everything works, though I haven't actually tried the camera on my microscope yet - it's certainly working under computer control and displaying the liveview image on the laptop screen, which is what I want.
Also posted at http://ffutures.dreamwidth.org/2095243.html, where there are