Old versions of Fetch such as 3.0.3 are lurking about out there and they are "abandonware". Fetch 3.0.3 is what I use for file transfer to System 7 Macs from my G4 and it works very well. Just type in the IP of your MacBook along with the username, password and desired directory into the Fetch connection window and it'll work a treat. It's also a good application for connecting to retro Mac FTP sites.