Macintosh OS X (10.5 or "Leopard")
- Look for Network Cards:
- Go to the System Preferences panel from the Dock or Apple Menu.
- Open Network icon under Internet and Network.
- The left menu shows your current network settings. Green lights for each device means it is
connected and red mean there is no connection.
- Select Ethernet from the left menu. Go to Advanced.....
- Under the TCP/IP tab make sure "Using DHCP" is chosen under the top option, "Configure IPv4".
- Renew IP address. Hit "Renew DHCP" or change it to a manual address. Click OK.Then restart and
change it back to DHCP to renew the connection.
- Click OK until you are back to the main
System Preferences window.
- Check your privacy setting
- Go to Sharing under Internet and Network in System Preferences
- Under Services everything should be unchecked.