Another Mac Pro1,1 upgrade


macrumors newbie
Original poster
Oct 27, 2017
So I updated my 2006 MP to dual X5355s. In the about this Mac program the system reports 2x 2.66ghz unknown as the processor. It does recognize that there are 8 cores.

I’ve tried using the firmware update tool to install 2,1 firmware but haven’t had much luck. From what I’ve read I have to have the Apple supplied dmg mounted too when using it? I’ve tried in both El Capitan and Lion but when I shut down and then hold the power button until it beeps it’ll show the update status bar screen for like 2 seconds and then boot into the OS without doing the update.

Is there a way to fix this or will my machine be stuck like this? Thanks