Yes Vue Infinite uses all 8 cores for rendering.  But for some operations such as ecosystem population, it only uses one core.

Hyperview doesn't work very well on the MacPro with OSX10.5.  It only renders to BMP and it doesn't seem to recognize older macs running OSX 10.4.  But, if you have older Macs, then you can use them to render from and then all is good and well.  Hopefully Vue will fix this in an update before Vue 7?  Its a "feature" that supposed to work.