I am trying to net work my MacBook and MBA. I have had some success transferring files, but when it comes to sharing the screen and down loading some files I get a prompt to enter the name and password, I don't have any idea WHAT name it wants me to use and none of my passwords work. The other option it gives me is to log in using my apple ID but this doesn't work either!!! I am so confused, I thought this was supposed to be easy with Macs. Maybe I am just stupid. I really need to be able to easily share files between these two machines. Also is there a way I can access my MacBook from out side of my home network with my MBA ie: at work while the MacBook is at home? Thanks for the advice!