I have a Mid 2012 iMac with Thunderbolt 2 and a new iMac with Thunderbolt 3. I want to transfer my data from one to the other using the Migration Assistant and started on 1GB Ethernet. The Transfer is now saying it will transfer in 18 hours and is going up. I swapped out the Ethernet cable with a Cross over cable and Directly connected them. It says it is transferring at 9MB/s When I started it was at over 60MB/s I was hoping to get a Thunderbolt 2 to Thunderbolt 3 Cable to use Migration Assistant at t he 20GB/s rate. Though all I can find is a Thunderbolt 3 Male to Thunderbolt 2 Female, so It would seem like I would also need a Thunderbolt 2 to Thunderbolt 2 Cable? Would that work?