Renewing DHCP Lease Mac OS 10.4(.7)
- Open System Preferences from the Apple Menu
- Click on the grey Network icon
- Select the hardware you are using to connect to the internet in the Show: menu (for a wired connection, select Built-in Ethernet; for a wireless connection using Airport, select Airport)
- Make sure the tab labeled TCP/IP is selected, and click on the Renew DHCP Lease button.