A:Answer I have a macbook air (mid-2014) running mojave, and i just got it up and running. The two issues were 1. the driver on the insignia site was not the latest driver, I had to go to to the displaylink site to get the driver for my OS, and 2. Ever since the Sierra update, apparently it blocks the use of this device or its software. Go to System Preferences > Security and Privacy and look for a notice on that first screen asking for permission to let it operate. I have only had it up and running for a few hours now, but I am completely happy with it so far. Mojave isn't even listed as being supported, but I took a shot and it is working just fine,