How to Connect Your MacBook to a Shared Resource
At the top of the Sharing pane on your MacBook, you can see that other Macintosh users can access your laptop at afp://<ip address>, where ip address is the IP address for your specific computer. When another Mac user wants to connect to your shared files, that person can do the following:
Choose Go→Connect to Server from the Finder menu bar.
After the Connect to Server dialog opens, other Mac users can type afp://<ip address> (where ip address is the IP address of your MacBook) and then click the Connect button.
You can also browse for a shared resource in the Connect to Server dialog. Choose Go→Connect to Server or press Command+K. Click Browse to locate the shared computer. Note that you might be prompted to choose whether you want to connect as a Guest or a Registered User.
To connect to the server as a Registered User, you must supply the right username and password. If you connect as Guest, you don’t have to supply a password, but you will have restricted access to only the Public folder for each account on the system that you connect to.
If you need to connect as a Registered User, ask an Admin user who controls that Mac to supply you with the correct username and password.
Give the username and password that you created to the person using the other Mac, and he or she can now access files in that account’s Home folder as well as any other Public folders on your computer.
The sidebar that appears in Finder windows offers a Shared heading. Click the arrow next to Shared to display other shared resources on your network, just as if you had clicked Browse from the Connect to Server dialog.