GeorgeVReilly
Bit poster
The same endless crash-and-reboot loop is happening on my 2012 non-Retina 15" MacBook Pro and Windows 8 Release Preview (64-bit). Win 8 is installing happily on VirtualBox as I write this.
I find this issue to be unacceptable. I understand that the Parallels team is working hard, but the Ivy Bridge MBP have been out for a month now. Other VMs work perfectly fine. I'm still waiting for this to be fixed though, mostly because I paid for the software.