I have assigned the drive to be connected to the VM I am about to boot. It is a functional Windows 7 virtual machine. I set VM boot order to include External device as the first device, and set External boot device to the Superdrive. Drive starts out connected to Mac, visible in Finder. When I start VM, Mac ejects the CD (or DVD - I have tried both). I re-insert the disk immediately. VM boot reports it is unable to initialize USB, and, even if I have no other boot device selected, boots to Hard Disk 1. I have tried "Select boot device on startup" - I have to press Tab first before I can press Escape, but USB is not listed among the options I can choose from in the menu which appears. I have also tried treating this as CD/DVD, but this makes no difference. It is unable to locate the SATA device. Since it's not an internal CD/DVD device, I wouldn't expect this to work. I have, however, been able to boot to USB thumb drives. I don't know if the problem is the eject of the disk from the Superdrive. I see an old post at http://kb.parallels.com/en/116509 That suggests hand-editing config.pvs to set these values: <UsbController UhcEnabled_patch="1" dyn_lists=""> <UhcEnabled>0</UhcEnabled> <EhcEnabled>0</EhcEnabled> <XhcEnabled>0</XhcEnabled> </UsbController> My XhcEnabled is set to 1, which might be incorrect. But I don't know if this applies to my situation. I am able to see other external USB devices (external hard drives). And, this information applies to older versions of Parallels. If I am already running the VM, and have the Superdrive device assigned to it, it will connect to Windows and I can review its contents. Is there any way to connect this situation so I can boot to a CD or DVD? This is helpful in certain kinds of repair/recovery situations. Thank you.
