Last night, I unwisely decided to try and migrate to my new MBA over WiFi. The results are probably what I get for not consulting Google first. While migrating, the screen showed no 'time estimation,' so, after about an hour, I figured there was a problem with the WiFi and tried to stop it. Instead of Command + Q to quit Migration Assistant, I was like, "Well, restarting fixes everything!" and proceeded to do that. Spoiler alert: No, it does not. Last night, I couldn't get either of them to do anything. The source MBA wouldn't reboot (still not sure what its problem was - it was just sending files?) and the target Mac, when rebooted, showed a silver 'no entry' sign: http://imgur.com/orarxc0 (Tried putting image into the post, but it didn't want to work. Computers hate me as of late.) Since then, the source MBA rebooted and was fine. (If anyone has any ideas on why it didn't want to last night, I'd love to hear them.) Old MBA was rebooted and still showed the No Entry symbol. I think it needs to be wiped - what cable(s) do I need? Also, I'm going to be using a Time Machine disk for my next go around the block (which will be whenever I get the target MBA wiped). Will that take as long / cause as much pain? If so, I'll just do it manually.