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Introduction
The 2009 Mac Pro shares an identical motherboard with the 2010 model. With a firmware update, you can use newer CPUs and upgrade all the way to 10.14 Mojave with a [link|https://support.apple.com/en-us/HT208898|supported graphics card|new_window=true].
It is important to note that you will need a Mac EFI compatible GPU installed while performing the flash.
IfWhile the Mac Pro shipped with an Nvidia GT 120, if you opted for a GPU upgrade from Apple at any point, you may have a different card. This could include:
• ATI Radeon 4870
• ATI Radeon 5770
• ATI Radeon 5870
Provided these are original Apple or Mac Edition cards, you should be fine to proceed.