5  Click the X in the upper-right corner of the window to close the Command 
Prompt window. You have completed this procedure. 
Note: If you cannot access the Internet, contact your service provider for further 
assistance. 
 
Renewing the IP Address on Macintosh Systems 
1  Close all open programs. 
2  Open your Preferences folder. 
3  Drag the tcp/ip preferences file to the Trash. 
4  Close all open windows and empty the Trash. 
5  Restart your computer. 
6  As your computer starts, simultaneously press and hold down the Command 
(Apple), Option, P, and R keys on your keyboard. Keeping those keys pressed 
down, power on your Macintosh but do not release these keys until you hear the 
Apple chime at least three times; then, release the keys and let the computer 
restart. 
7  When your computer fully reboots, click the Apple icon in the upper-left corner 
of the Finder. Scroll down to Control Panels, and then click TCP/IP. 
8  Click Edit on the Finder at the top of the screen. Scroll down to the bottom of the 
menu, and then click User Mode. 
9  Click Advanced in the User Mode window, and then click OK. 
10  Click the Up/Down selector arrows located to the right of the Connect Via 
section of the TCP/IP window, and then click Using DHCP Server. 
11  Click Options in the TCP/IP window, and then click Active in the TCP/IP 
Options window. 
Note: In some cases, the Load only when needed option does not appear. If it 
appears, select the option. A check mark appears in the option. 
12  Verify that the Use 802.3 option located in the upper-right corner of the TCP/IP 
window is not selected. If there is a check mark in the option, select the option to 
clear the check mark, and then click Info in the lower-left corner. 
13  Is there a Hardware Address listed in this window? 
  If yes, click OK. To close the TCP/IP Control Panel window, click File, and 
then scroll down to click Close. 
  If no, repeat these instructions from step 6. 
14  Reboot your computer.