So it seems that after a few months our computers, yes even our macs, slow down a bit. I just purchased a new macbook pro and am wondering on the best route to take as I transfer files from my old macbook to the new pro. I'ver read about doing it from a TimeMachine backup as well as just using the migration assistant. But, will moving my files slow down my new computer and make it act like an "old computer" since it will have basically all of the old files? What would you do?