Giving the macmini to the mother in law and will be purchasing two iMacs for the home office/study. Kids are getting older and generally need (want) them at the same time. Cant argue when they want to do math or history on the computer! So with two imacs I will lose a CD drive. I'm not terribly concerned as we rarely use it but can I have one apple USB superdrive shared by both iMacs? I sure dont want to purchase two of them. Thanks.