When I try 'Set Up' on my Macbook, it says to get the key from the iMac (other machine) with several groups of letters that I suppose I am to memorize. After going through all the other stuff I then go upstairs and look for the key under "Options" . no "options" that I can find and no key. Seems obtuse and circular. I would like to be able to synch my iMac, Macbook, iPad and iPhone. If possible .. how?? Tahnks, ed