How to Share a MacBook With Another Laptop

Select the “Apple” menu in the upper left corner of the Mac OS X desktop. Select “System Preferences.”
Select “Sharing.”
Place a check next to “File Sharing” (by clicking the box) to turn file sharing on. Make note of the “Computer Name” as this is what the MacBook will be listed as over the network.
Click the “+” button beneath “Shared Folders” to add the folders you’d like to share over the network with the other laptop computers. By default, the “Public” folder is shared.
Select “Options...” and then enable “Share files and folders using AFP” to easily share your files with other Apple computers over the network. If you are planning to share your files with a Windows computer, enable “Share files and folders using SMB (Windows).' You will need to enable a user account for Windows sharing. Turn on the account you wish to share (by clicking the box) and enter the password as prompted. Click “Done” to apply the changes and close “System Preferences.”
Select “Network” from the Finder’s “Go” menu bar on the laptop you are using to connect to the MacBook you just configured. The MacBook will be listed and accessible for file sharing (provided they are on the same network). Open “My Network Places” (or “Network” in Windows 7) within Windows Explorer to view and access the MacBook from a Windows machine. You will need the user account and password to gain access.
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