Just a quick post today on something I needed to do. You can use a Thunderbolt cable (not cheap) to transfer files between two Macs.
In my case, the WiFi connection on the Macbook was not functioning well and I need to transfer several GB of data over, I did however have a Thunderbolt cable.
Use this method on Apple’s Support site. It works on Mountain Lion as well.
5.3 GB in about 15 seconds