I recently got a new MacBook Air and used Migration Assistant (henceforth abbreviated as MA) to transfer my stuff from my old MacBook Pro. However, until MA actually worked all the way, I had to abort it and restart both machines three times. This resulted in around 50GB of wasted space in my new macbook (but no extraneous user accounts, as I read elsewhere) that I don't know how to eliminate. I assume there are some cache files that MA creates & uses until the entire migration is complete. Where can I find these files, to delete the leftover ones from the incomplete migrations?