Chosen Solution
I am unable to use an external display using either a MOSHI USB-C to HDMI (4K 60) or Insignia adapter. So far I have tried: Resetting NVRAMResetting SMCReinstalling system software MacOS High SierraDifferent adapters (MOSHI and Insignia)Different HDMI cables that work with my older MacBook Pro and external displayDifferent displays
Some hub/adapters are just finicky and refuse to work no matter what. Some hub/adapters will work after Macbook will first go to sleep with the hub/adapter plugged in, enabling the video output on waking up. If you disconnect such a hub/adapter from the Mac you will most probably need to repeat aforementioned procedure again. And some hub/adapters will just work no matter what, including the one made by Apple itself.
