I have this exact setup and I'm not able to get the Apple Thunderbolt Display to light up.
Here are the details:
- Mac Pro 5,1.
- Pre-Flashed Gigabyte Alpine Ridge with pins 1 and 3 jumped installed in PCIe slot 4.
- Radeon RX 580 outputting DisplayPort --> Alpine Ridge mini-DisplayPort IN.
- Alpine Ridge Thunderbolt 3 --> Apple Thunderbolt 3 to Thunderbolt 2 adapter.
- Apple Thunderbolt 3 to Thunderbolt 2 adapter --> Apple Thunderbolt Display
I'm just getting a blank screen.
Oddly, when I got to the macOS System Profiler, I see it recognizes the Apple Thunderbolt Display in the Thunderbolt panel but nothing else appears in displays, etc.
Do you recall where you saw confirmation that this even works?
Any help would be greatly appreciated. Been working on this for a quite a while now. This setup was supposed to be a Christmas gift but could not get it working in time.
I initially ordered the Titan Ridge with no success prior to ordering the Alpine Ridge.
I also ordered a Startech Thunderbolt 3 to Thunderbolt 2 adapter just in case that helps. Arrives Friday.
Thanks so much in advanced!
Joshua