Migration old to new Macbook Air
I am trying to move old MBA to new MBA. I have a TC BU on external disk. I was starting up the migration and all seemed to be OK. It recognized my old TC and the new external drive, and listed all the backups. I decided to check the MacOS level and needed to up date the one new to make them the same, 11.4.
I tried to restart the migration and the new MBA does not recognize the external drive now. I moved it back to the old one and all is OK, I even did a backup.
Any idea of why the new Mac won't recognize the external drive? I have been using it on my old system for months. Not sure what to do. I can go from Mac to Mac, but that will take forever.
MacBook Air 13″, macOS 11.4