If I try to drag windows into it from my main display, the move over & disappear form the main display, but are not displayed on the monitor.
The mouse pointer moves into the display & moves around normally, but clicking has no effect anywhere, and nothing on the monitor gets focus. When I go to System Preferences / Displays / Arrangement, I can see the monitor represented, and, if I move it in the Arrangement window, the monitor lights up, gets a background image and a disabled menubar, and a dialog for scaling & frequency. I plug the monitor in & it's recognized, but looks blank.
I just received my new AOC I1659FWUX, downloaded & installed 'DisplayLink USB Graphics Software for Mac OS X and macOS 4.3.1.dmg (which installs 'DisplayLinkDriver 4.3 (206) and the following bizarre behavior results after a restart: