FYI: Same issues on my 17" Apple MacBook Pro 2.8 GHz (June 2009) in a Parallels Desktop Virtual Machine running Vista Business with all latest Service Packs and updates etc. installed.
Dyson 1.2, on the other hand, ran w/o any problem (glad I still have the installer) in the same VM, and also in a Virtual Machine w/ Windows 7 RC1 (32 bit) and also when booting into my XP Professional partition via Bootcamp (all latest drivers, updates and service packs installed).
I was able to play the game, though, albeit with strongly diminished game fun, being not able to read the texts and therefore also unable to change the settings cause I didn't know what the controls did.
I sure hope that you'll be able to find a solution which includes such odd men out like me wanting to play it on that other computer, either in a virtual machine or booting from the Bootcamp partition. Anyway, once you've ported it to Mac OS I'll fersure be happier.
Greetings, Tom in Germany
What I forgot to say: Another graphics problem (?) was that there was far too little contrast between the flying units (colony seeds and defense seeds) and the respective background, which makes it very hard to visually check whether I can build etc. Probably the same problem.