I'm trying to wirelessly transfer data from my mid-2010 Pro to my new Pro. Both have fully updated software (OS X El Capitan version 10.11.1 on both units) and no updates remaining (everything right down to printer updates have been installed). Both units have been restarted within the last 24-hours. Both units have firewalls off (all connections allowed). Both units are connected to the same Wifi. On the unit I am transferring FROM, my source computer, I have selected "to another Mac" in MA, and on the unit I am transferring TO I have selected "from another Mac". A message appears every time I attempt to transfer files ("MacBook Pro 1 (my source computer) could not be reached" ensure both computers are on and connected to the same network) and the unit I am transferring FROM will not recognize the unit I am transferring TO. They are 100% on the same network. I have checked and rechecked. What am I doing wrong here? Any insight would be greatly appreciated!