I have Niresh Mavericks working fine on a couple of AMD desktops.
I used the latest MacPwn to create a bootable USB with the Yosemite App Store download.
USB has been created successfully.
But I cant get two of the AMD desktops to boot into the installer.
On both systems the USB will try to boot, I see a 6 appear on the screen.
On one AMD machine I get the 6 display and then a blank screen, I left for 20 minutes and nothing.
On the other AMD machine I see the 6, a cursor for a minute or two and then what appears to be a EFI bootloader with a few options, but none that allow a boot from the USB.
None of these systems have options in the BIOS to disable EFI.
What am I doing wrong?