Migration Assistant not working...help!
Trying to help a friend move from his old MacBook Air (13-inch, late 2010) running OS 10.13.5, to his new MacBook Air (Retina, 13-inch, 2020) running OS 10.15.3. Can't go to the Genius Bar so hope you can help! Migration assistant up on both units, which are on the same wi-fi network. New MacBook sees the old one (see attached pics) but when I click "Continue" I get "Unable to Connect" message. Firewall and File Vault are OFF on both units. Tried setting Target Disk Mode on old computer, but (a) in System Prefs>Startup Disk there is no "Target Disk Mode" button, and (b) if I restart old computer holding down "T" key, it does not work, all I get is a flashing folder-with-question-mark icon. Any suggestions on what's going on and if it's fixable?
MacBook Air