SEJU

As far as I know Mac Pro (2012) uses the same CPU generation as the Mac Pro (Late 2010). If Mac Pro (Late 2010) isn’t supported Mac Pro (2012) wouldn’t be supported too.

William we should also consider the importance of PCIe, QuickPath etc for a Pro Mac. The Mac Pro 5.1 was limited to PCIe 2.0 although 3.0 came out in late 2010. The Mac Pro 6.1 used PCIe 3.0 and thunderbolt 3 is actually only exposed ×4 PCIe  PCIe 4.0 has been out for some time, but industry will probably switch to PCIe 5.0 and don’t use 4.0. My guess is that Apple did not update the MP 6.1 because the QuickPath and PCIe did not progress enough after 3.0. Since Apple sees the future of computing in integrated systems which you can interconnect it is all about the I/O system. PCIe 5.0 is currently at draft v 0.7 and v 1.0 will be ready at the end of 2019. After PCIe 5.0 will have been adopted Thunderbolt will be able to increase its speeds. By the way PCIe 2.0 is 5 GT/s, 3.0 is 8 GT/s, 4.0 is 16 GT/s and 5.0 will be 32 GT/s or 63 GB/s.