I'm using the Apple wired keyboard with num pad which I connected to my 27" Cinema Display. When the Mac Pro (mid 2010) was shut down, and I start it, the Mac can't find the keyboard. Instead, it opens a bluetooth window, saying that no keyboard could be found. The wired mouse is connected to the Cinema Display as well and there's no problems. I have to unplug the keyboard from the Display, then reconnect it, and sometimes I have to do this 3 times for the keyboard to appear. What's wrong here? I sometimes also have to plug it into another port of the display. But it can't be the ports/the display I think, because the mouse has no problems. So I thought it must be the keyboard. But it can't be the keyboard because when I directly connect it to the Mac, it instantly appears. Anyone know what this could be?