I am, like many other users here, an avid user of Duet Display. I updated my iPad Pro 12.9' 1st gen to 11.3 Dev Beta once it was available. This afternoon, I tried to use Duet to turn my iPad into a second display for my rMBP and got stuck in an endless loop of "Launching Duet". I have contacted customer support and they said its a known issue that they are working on. If you like using Duet, don't update to 11.3 yet!
