My Mac Pro Mid 2012 5,1 is a power house. Surprised they cut that model out. The 6,1 is supported and you can put a much more powerful video card into the 5,1 and I think my dual 3.46 gig 6 core (for a total of 12 with 24 threads) can handle it much better than my 2012 mid macbook pro laptop that will be supported. It's crazy....
I'm assuming you're talking about Catalina, but the 5,1 is supported in Mojave.
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