I don't think Virtualbox has a UEFI option, so I think virtualbox is (rightly) booting legacy. But still it can't boot from that ISO I just tried VMWare Player I notice that one can choose UEFI or not ...

I currently have a license for Fusion 3, but it doesn't really work so well on 10.8. On Linux I was using VMWare Player for running Windows programs as needed, and it kind of irks me that they don't ...

If your Event Viewer Log says "The VirtualBox system service service terminated unexpectedly" with Event ID 7034, follow ...