Sharing an Internet connection from your Mac is trivially easy:
- Open System Preferences
- Choose Sharing
- Tick the Internet Sharing checkbox
Typically I share out my wired Ethernet connection over wireless (Airport in Mac parlance).
You'll need to configure the Network Name (the SSID) and the encryption settings. Unfortunately WPA is not yet supported so your best bet is 128 bit WEP. You'll also need to choose a 13-character password if you want Windows computers to share your network (if you're network only has Mac's then feel free to choose any length password).
Connecting any Mac to this network is trivial. Simply turn on AirPort, browse to the network and enter the password.
Unfortunately, from a Windows PC it isn't quite so obvious - you can't just auto-detect the network and enter the password. You'll need to perform the following steps:
- Open Control Panel, Network Connections and click on Wireless Connections
- Add a new wifi network
- Enter the Network Name that you created on the Mac - it must match exactly
- Set the Network Authentication to Shared
- Set the Data Encryption to WEP
- Uncheck "The Key is Provided Automatically" and enter the 13-character password that you chose earlier
You should now find that the Windows PC can connect to the network.
If you're using a wifi manager other than the standard Windows functionality then you may need to experiment on the various settings. One manager I had to configure wouldn't work until I chose Enterprise as a network type.
I'll try and get some Windows screenshots soon (my VM doesn't have a wireless connection).
Hope that helps someone!