Aj: You can get the plugin integration to perform better if you have the time and patience to look into how your USB buses and devices are connected (both internal/onboard and external). I'm sure that if you move things around, disable the things you don't need and upgrade drivers that are not up-to-date you can find a place for the Virus where it can get all the bandwidth it needs.
I've had this synth from new and have run it on numerous operating systems both windows and mac. It's like the tanks Hitler had made. In theory wonderful, but they just didn't work. And as for drivers? What does that mean in the world of mackintosh?