Displaylink ceases to work in 10.13.4

[Wozzy]

Originally Posted by Neo.aka.Darkman

As I've already said above: it's all about external graphic adapters. In 10.13.4 Apple began to provide native support for external GPUs. They have rewritten large parts of IOGraphicsFamily.kext, what brings us to the point, that all virtual graphic adapters are now unusable.
DisplayLink has reached some progress using AirPlay Technology, but since Mojave beta 3 it's broken.

You are testing beta software on a developer release and you expect it to work

DL need to get a final driver out for HS first. Enterprises that use DL are not going to want to distribute beta software.