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Hi Josh! It was dosdude’s patch tool that was used to install Mojave without flashing. Everything is running smoothly since installing a new video card - Radeon RX 570 - and even figured out the issue as to why the monitors were not working when using a displayport cable. Exactly what I was thinking, that in theory it should work and there’s no reason it should not but I have not found anyone who has attempted this.
I still have my original GPU which was an upgrade via Apple. It’s an ATI Radeon HD 4870. Trying to do as much research as possible before contemplating the firmware upgrade. I use this computer quite a bit for work so don’t want to end up with a very large cheese grater that does nothing.
My Boot ROM version is MP41.0081.B07. Thanks for responding and any insight/advice is welcome and much appreciated! Happy Friday!
So I’ve already updated my early 2009 Mac Pro running El Capitan to Mojave using a patch tool before I found this site and instructions. Put a new videocard in and – with the exception of not being able to use my second monitor for some reason (next fix to search) – is running beautifully. Curious if I would still be able to update the firmware to 5, 1 from 4, 1 even though Mojave is already installed and running? Wish I had found this earlier - would have saved time! Thank you in advance for your response.
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