Gadget 2 on Mac 10.13 not working



I'm trying to run lights with a Gadget 2 on my mac with high sierra 10.13.1 but it's not working. It seems that there is no dmx output coming from the gadget.

The dongle is working and the number of the external device looks all right. I also already tried to restart the mac, plug the gadget in and out… I also did an update of the ETCnomad software. 


Maybe someone has an idea what I can do? 

I'm also wondering if this may be a problem of compatibility with macOS HighSierra.


Thanks! lea