I just got my brand new 2021 MacBook Pro with M1 Max, 64 GB RAM, 8 TB SSD. I’ve got Migration Assistant running copying my old 2009 MacBook Pro, 2TB hard drive to it (8 GB RAM, El Capitan OS) I’ve plugged them into each other with a Firewire 800 to Thunderbolt 2 adapter plugged into Thunderbolt...