BEST WINDOWS VIDEO CARD FOR MAC PRO 2009 INSTALL
kext is loading and ATIFacelessFlash.app is prepped, shut off the computer, move your old video card up one slot, and install the new one in Slot 1 as shown in this picture. Warning: DO NOT install Windows from a USB flash drive. The command sudo kextutil -nt ATIROMFlasher.kext is useful for this, and you’ll likely have to do sudo chown -R root:wheel ATIROMFlasher.kext and sudo chmod -R 644 ATIROMFlasher.kext to get it loading. Ensure that ATIROMFlasher.kext will load. I just now tried both the beta and the last update main and they both work great on a similar sustem (Mac Pro 2009 with a GX-980ti running Windows 10).ATIFacelessFlash.app/Contents/Resources and put your. If you don’t have a 512MB Sapphire ATI Radeon HD 4870 you will likely need to find another or make your own firmware image. I used sapp-512-4870.rom from this MacRumors: Forums post.
This will be used as an OS X native ATI video card flasher for doing the firmware update. Acquire the iMac Graphics FW Update 1.0.2 and use Pacifist to extract ATIFacelessFlash.app and ATIROMFlasher.kext from it.