Mac Pro (late 2013 model) EFI and iPXE booting

[mcb30]

(2014-05-14 20:49)Pretzel Wrote:  So far, I've tried downloading the iPXE source code via git and compiling the code on my Ubuntu 14.04 machine via the "make bin-x86_64-efi/ipxe.efi" command. I took the "ipxe.efi" file in the "bin-x86_64-efi" directory and renamed it "bootx64.efi" and stuck in "/EFI/BOOT" folder on a USB flash drive. When the Mac Pro boots (using the Option key), it sees this file and gives me the option to EFI Boot. But when I select it, I briefly get a black screen and then it just boots into Mac OS.

Are you able to get to an EFI shell? If so, please try running ipxe.efi from the shell and see what error messages you get.

Michael