I'd like to connect my old and new Mac to allow exchanging files easily. Currently I take the "primary Mac" that's connected to the internet offline by unplugging the ethernet wire and then plug this wire into the "secondary" Mac to allow file transfer. Is there a way to connect the two computers without disconnecting the "primary" Mac from the internet? My pet hamster, who knows more about computers than I do, claims the Mac that is not connected to the internet will attempt to go online and likely find a way once it's connected to the other Mac that is online. What are my best options? "Help me, Obi Mac Kenobi, you are my only hope!"