hi, i'm new to mac and OSX. i have this problem of trying to pair Harmony 650 remote to my mac mini 2012. i goto system preference-->security & privacy-->Advanced-->Pair and pressed the pair button on the remote pointing at the mac, nothing happens. what am i doing wrong? i've tried many times and unpair also doesn't work. logitech support advised i tried to add device in the Harmony apple TV instead and use to Unpair. also nothing happened. appreciate if anyone has detailed instructions how to go about it.