Went to start up new Mac Mini earlier today and at first just got a grey screen then a graphic popped up that toggled between two images (one looked like the side of a laptop and the other like the underside of a mouse?) with what looked like the power button in green. So I gave it a minute and then powered off gave it a sec and turned it back on and then got the prompts for the set up. This happen to anybody else or does anybody know what this was?