How To: Share Your Mac’s WiFi Connection w/ Xbox 360
If you own an Xbox 360 and your network router is in another part of the house (or just too far to run an ethernet cable), then you’ll want to use a WiFi connection to connect to Xbox Live! Of course M$ offers an adapter for about $90 that connects via USB to your Xbox 360, but we’ve figured out a solution that may save you some loot!
If you own a Mac with an airport wireless card installed, you are most likely connecting to the internet via Airport (Mac’s WiFi connection). If your Mac is closer to your Xbox than your router is (or if you use a laptop), simply connect a Cat5 ethernet cable (not a crossover cable) between your Xbox and the Mac’s ethernet port.
Then goto: System Preferences>Sharing and click on Internet Sharing. (The box will likely not be checked). You’ll want to make sure your “Share your connection from:” drop down menu says Airport. Then check the box that says Ethernet. After you’ve done this, you should have an option to Start internet sharing.
Now you’ll need to configure the Xbox to communicate with your Mac:
Open the Terminal.app on your Mac and type: ifconfig en0
You should see a line that reads: inet 192.168.2.1 Note this IP address for later use.
Now type dig in the Terminal.app and look near the bottom for a line that starts with “SERVER”. You’ll want to note this address as well.
On the Xbox, enter the network settings menu (refer to manual) and edit the information as follows:
IP Configuration: Manual
IP: 192.168.2.2
Mask: 255.255.255.0
Router/Gateway: 192.168.2.1 (or the address returned from the ifconfig command above if it’s different)
Then edit the DNS information as follows:
DNS Configuration: Manual
DNS Address:[enter the IPs of the dns server displayed from SERVER line of the dig command]
PPPoE Settings: Off
Advanced: Automatic
Now test your settings and you should be online!