


MomacOS is the operating system designed to run on Apple laptops and desktop computers. The OS update is actually a separate process, which I hadn't realised until that point.Tackle your tasks with Setapp app suite solutions. After doing that, it worked & all went smoothly after that. Successfully got the Restart button to work, no probs, but the firmware update didn't succeed after holding the button until the light flashed.Īfter a bit of Googling, I found a note that said to hold the button not only until the light flashes, but keep holding until you hear the beep tone. I first stripped all except the boot drive & keyboard/mouse. Let us know how it goes - I have a similar machine.

Note: I gave up after about 6 pages of that thread, but the general consensus seems to be the above instructions do work. Have to install an EFI video card (this is true also if your flashingĪ 4,1 to a 5,1) if you dont have a EFI video card then it won't update Just a heads up to update the firmware on a Mac Pro 4,1 or 5,1 you DO NOT shut down the machine during the firmware update.
