– Go to the iChat menu and select “Preferences.”
– Click “Accounts,” then click the “+” at the bottom.
– Select “Jabber” from the pull-down menu, then enter the following info:
Screen Name: yourfacebooknickname@chat.facebook.com
Password: <your Facebook password>
– Click the arrow next to “Server Options” and enter the following info:
Server: chat.facebook.com
Port: 5222
(Uncheck the box labeled “Use SSL”)
Now, you can chat with your friends in facebook via iChat.