[yalok]

Lunar worked great for me on MacBook Pro 2020 (2 monitors, one connected over USB-C to USB-C cable, another one over USB-C to DisplayPort), but doesn’t work on for the same monitors connected to MacPro via 2 HDMI cables…

Any idea why?

[alin23]

The HDMI port on most recent Mac devices uses a converter chip inside to convert the signal to DisplayPort internally. That chip has DDC/CI blocked in its firmware and there's no way to enable it.