This applies to people who want to connect the Wii to the internet but do not have a wi-fi. Nintendo provides a Wii USB Wi-Fi connector compatible with both the Wii and DS

Once installed you simply have to configure your Wii console set in:
Wii options, and (wi-fi connector usb nintendo) accessible from the submenu (Internet)
Wi-Fi
STEPS:

* Firstly, to connect your Wii to wifi it should turn on your Wii and click on the tab:
* Option
* Parameter.
* Go go to page 2 and click on Internet.
* Setting Connection and choose one of three locations.
* Wireless.
* Find an access point.
* Select your network operator from the list.
* Enter wi-fi network key and click OK before saving.
* The Wii will connect automatically and ask you if you want to update, say yes.
* To play online games you must make some updates click:
* Option .
* Parameter.
* Wiiconnectct24
* Then click validate

Wi-fi connection (MAC)

* The network configuration:
* Click the apple in the top left of the screen.
* System Preferences
* Sharing
* Then Internet.

Method 2 :  Sharing an existing  Internet connection with the Wii

* Network card in your computer (eg Airport for Macs) wireless connection.
* Now click Airport Options.
* Then you’ll need to choose the name given to the connection Give the name you want, it does not matter.
* Click OK to accept the change.
* Now, go back to System Preferences, then:
* Click Network.
* Show and select AirPort.
* TCP / IP.
* Configure IPv4 Manually.
* And enter the following parameters:
* IP Address: 10.0.1.15
* Subnet: 255.255.255.0
* Router Address: 10.0.1.1
* Both DNS Servers: 10.0.1.1

Detecting Wireless Connection

* Check out on the Wii if you detect wireless connection. You must enter the information manually in the setting of the Wii for this to work properly.
* IP Address: 10.0.1.25
* Subnet: 255.255.255.0
* Router Address: 10.0.1.1
* Both DNS Servers: 10.0.1.1