I had heard that during the earlier public betas (PB1,2) that if you were on firmware revision .0085 and up that you don't need to perform a firmware update, I thought I'd take my shot at Mojave and downloaded the latest PB which is v6 and to my surprise it requires a firmware update. This is a genuine mac pro 5,1 btw.
Hopefully I'm not embarrassing myself here as this may already be common knowledge among this forum.
Hopefully I'm not embarrassing myself here as this may already be common knowledge among this forum.