I have an MT-48 connected to an M1X MacBook Pro running OS 13.6, using Logic 10.7.9. No problems when powered and connected via USB. I also tried to connect (and power it for convenience) from a POE ethernet switch, so that I could control the unit remotely from an iPad. That worked, but I was getting drop-outs in the DAW volume when adjusting the right headphone volume.

I'm curious as to whether, if one were to install the Ravenna driver, if it could run without any USB at all. Probably no advantage in doing that though, unless I had actual AES67 devices.

Some people have had problems registering - I think the published URL is incorrect, it should be
https://product-registration.neumann.com/login

I keep the screen dimmed (Menu > Settings > General > Interface Controls > Display Brightness & Button Intensity). But I wish I could turn it off completely without turning off the unit, or have some sort of standby mode. Sometimes you need the room to be dark, and that thing is very bright.