Mac OS X

1. Select Apple menu > System Preferences...
2. Click Sharing in the Internet & Network section.
3. In the Sharing window, if necessary, click the lock icon and autheticate using the administrator userid and password.
4. Follow the steps for your operating system:

• Mac OS X 10.4  - Choose the Internet tab and verify that Internet Sharing Off is displayed at the top of the tab. If Internet Sharing is ON, click Stop to disable this feature.
  
  

• Mac OS X Leopard - Make sure Internet Sharing is NOT checked.  If Internet Sharing is checked, uncheck it.
  
  

5. Click the lock icon to prevent further changes and quit System Preferences.