The one that's been driving me up the wall lately is that I can't use screen sharing unless the iPad and the Mac are on the same Apple ID. It really kills the

The one that's been driving me up the wall lately is that I can't use screen sharing unless the iPad and the Mac are on the same Apple ID. It really kills the value of that feature in a setting where multiple people who each own their own set of devices want to be able to work together more easily. Like, say, homes, offices and schools.