Hi folks, The title says it all. I wanted to ask someone with an advanced mac driver experience if this theory could be done? 1. Check out the PCI upgrade card from Sonnet for Thunderbolt 3 functionality: https://www.ebay.de/itm/Sonnet-TBL3...388188?hash=item46803ffe1c:g:iZ8AAOSwb2JblP74 (its in german, but you should find the US version as well) 2. Assuming PCI standards are real standards, the PCIe card should fit into a Mac Pro 5.1 slot just fine. 3. Copy existing Apple driver for Thunderbolt 1/2/3 from an iMac 4. Use Apple iMac driver package with slight modification for Mac Pro 5.1 5. Would this be feasible, or am I delusional here? 6. If so, (with a minor effort) - Could we start a small MRumors fundraising to develop driver package for 5.1 ?? I thought, this question would be worth contemplating ..