Hi, I've been trying all day to install a Windows 8 partition, with some help from BootCamp, in vain. I used BootCamp to make the bootable USB, download drivers and create the partition. Then, when the Mac reboots, it goes straight to a black screen displaying "No bootable device detected". When I restart it and try to boot on the USB Drive, first the USB is labeled "EFI Boot", which is quite not normal, and when I hit enter, it juste freezes on the drive selection screen, and I have to manually reboot it. I also tried with rEFIt, it shows 3 different ways to boot on my USB Drive. The bootmgr.efi didn't work, rEFIt returned an error, don't remember what it was. The bootx64.efi crashed just like it does when I selected the USB Drive through Apple boot manager. And then "Boot Windows from HD" displays the black screen and "No bootable device" message. Edit : The problem might certainly come from the BootCamp utility I used to make the USB Bootable. I read somewhere that Windows 8 supports EFI Boot, which I don't quite understand how it helps me, but I believe that the way BootCamp treats the USB do make a bootable Windows 7 drive doesn't work with Windows 8. So, how can I make that USB Bootable on my Mac ?