Hmm I guess I assumed that the mid- or higher-end models with the Iris graphics (2 TB ports + the HDMI) would support 3 screens at 1920x1080 each. But after about 20 minutes of Googling it seems I'm wrong. So there is no good solution for 3 monitors on any Mac Mini running any recent version of the OS. Ugh. I guess I am still somehow holding on to hope that the bug with the drivers will be fixed and the USB3 adapter I have will become usable again.
