Yea dude I’ve been having thes same problem as you (I think) I’ve tried connecting my MacBook Air and pro but both of them only show the display (front screen) without the folders, tabs, nothing at all but the option bar up top. It is completely unresponsive to my actions, whether I connect the mouse to the monitor or the MacBook. Let’s hope to god this question gets a lot of likes because I am too, interested in figuring out this problem