To Fl0r!an
Hi, i jus bought a Sapphire R9 270X 2GB Dual-X for my Mac Pro 5,1 (E271 CURACAO XT GDDR5 64Mx32 2GB 150e/150m, DevID: 0x6810) and i need to flash it for mac EFI boot. By using the default bundle from netkas (
http://forum.netkas.org/index.php/topic,5619.0.html) and following his guide, i partially succeed. Although EFI is working and the boot menu is showing by pressing the alt key, i cannot go further than that. If i boot Mojave or catalina (apfs partition) i get a black screen in the last stage when the OS try to load the graphic extension. Also only one DVI port is working but no problem it’s enough for me.
I would be pleased if you can PM me a working modified ROM fitting my card configuration.
I see in another forum that someone had success in flashing his card by executing the script from an « upgraded » netkas bundle2 where the efiromheader is replaced by one called "efiromheader_7950.rom". Unfortunately no way to find this upgraded bundle2 in the net. Any advise is welcome.Thanks in advance.
PS: My card with his original pc bios work perfectly with acceleration in Mojave apart the inconvenience of not being able to manage the pre/early boot stage (no EFI boot screen)