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.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.I’ll recap the steps that I performed here: To do this I followed Alexandre Boeglin’s article entitled How to flash a PC 4870 for a Mac Pro, using only Mac OS X.
This shipped quite quickly, and arrived in great shape with all the original retail box items, which was a pleasant surprise.Īfter getting the card and the cables, it was time to install it and flash it. Next I purchased a Sapphire 512MB ATI Radeon HD 4870 from eBay with a winning bid of $110 ( Auction Mirror). These cables thus plug right into the main board ( Picture) up near the SATA connectors, then connect right to the back of the video card ( Picture). As Macs tend not to have extra connectors just hanging around in the case, Apple provided the power connectors right on the main board. Most modern video cards require more power than the slot can provide, so these connectors are generally connected directly to a PC’s power supply to provide the extra needs. These cables allow one to get PCIe 6-pin power connectors from the Mac Pro mainboard. However, last week I was looking into it and all the pieces came into place, with good flashing instructions and firmware available and a relatively cheap, compatible card appearing on eBay.įirst, I ordered two power cables from ATI, Power Cable for Radeon® X1900 MAC G5 Edition. Typically there are ways to flash PC video cards with Mac-compatible (OF or EFI) firmware, but reliable methods and card versions aren’t always the easiest to find. I’d occasionally been considering picking up a new video card for my Mac Pro (MacPro1,1) to replace my NVIDIA GeForce 7300 GT, but the new ones are very expensive.
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