Mojave needs firmware update

[Wbennett102]

I am trying to upgrade from 10.13.6 (HS) to Mojave but I immediately get a message that my Mac Pro needs a firmware update. After performing the update my Boot ROM version has not been updated. It remains MP51.0085.B00 and I can't get past this message saying I need a firmware update. Apple support is telling me that it may support Metal but it's not on their list of compatible cards. They told me to get a 580 which is on the compatible board list. It just seems odd that this firmware update requirement would be caused by an incompatible video board. Below is some information from my "About This Mac" screens.

Mac Pro (Mid 2010)
Processor 3.46 GHz 6-Core Intel Xeon

Graphics Radeon RX 480 8192 MB
Metal: Supported, feature set macOS GPUFamily1 v3

Anyone familiar with a similar problem?

tia

 

[Wbennett102]

Resolved!!! It turns out the installer needed to install a "Helper Tool". The problem was that when I clicked on the notification in High Sierra to upgrade to Mojave it took me directly to the screen that said I needed a firmware update. But, without the "Helper Tool" the firmware did not update. However, when I went to the App Store and clicked on the Open Mojave icon I did get the screen that said it needed to install the tool and needed my admin login to proceed. I then got the screen to update the firmware and this time it applied the update and proceeded with the Mojave installation. Also it seems to be working fine with my older Radeon RX 480 card which is not on Apple's list but does have Metal support. At this early stage I'm not sure I see any performance improvement over High Sierra.