If you're a devoted Mac user like me, chances are, you'll have an old Mac sitting around somewhere, collecting dust. Don't give it away or send it off to be killed, repurpose it for use as a home file server! With simple configuration, you will be able to access its files wirelessly, from anywhere within your wireless network. Stream music, movies, and videos! Save files without wasting valuable hard drive space on your primary computer! The possibilities are (almost) endless! All you need is a Mac running OS X with an internet connection, so let's start!
Step 1: The Computer
To get your file server up and running, you only need two things: a Mac running OS X and an Ethernet Jack or AirPort card. Because the original AirPort card was releases in 1999, computers produced before then (like the Power Macintosh G3 I am using) will not support wireless internet connection. To remedy this, you will need an Ethernet jack somewhere in your house, and a cable to connect it to your spare computer.
Update 3-29: The "Ye olde I-don't-know-what" port is actually an ADB port.
Step 2: Configuring your File Server
Apple made it extremely easy to configure your computer for file sharing in OS X. Just open System Preferences and click "Sharing." Under the "Services" tab, find "Personal File Sharing" and check it off. A few seconds later, Personal File Sharing will become active. Look near the bottom of the window and notice the text ("Other Macintosh users..."); Keep it in mind as we go on. You are done configuring your server!