![]() I now have a MacPro 2009 which reports Model Identifier: MacPro5,1 So I hacked the scripts within the tool and ran them directly. ![]() I could not get the firmware updater tool to work. Perhaps someone could help shine some light on this. I saved the contents of the ramdisk before I shut it down to attempt the flash I don't know whats keeping it from flashing or at this point its even possible anymore. ![]() Remember I'm trying to DOWNGRADE, yes, I'm using all the original OEM hardware CPU/GPU. If I shut down and reboot, firmware is still 00 I did the whole flash procedure (hold power button till light flashes & deep beep) however something isn't right, the apple logo appears and the flash progress bar appears but it goes from 0% instantly 100% (I'm talking blink and you'll miss it) and nothing happens afterward. Okay so under OSX High Sierra, i downloaded both FW packaged from Apple 1.4 & 1.5 with the DMG mounted to the desktop the patched FW utility was able to create a ramdisk and said to shut down. I think I have an idea whats going on, I Believe I have to downgrade to 03 and then to 07? I downloaded the patched version of the FW tool The only thing is it keeps failing to downgradeĬurrent FW is 00 that was supplied with High Sierra FW update I need to downgrade my original 4,1 (that was upgraded to 5,1 via FW update tool) reason being need to warranty it out the system for an unrelated problem.
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