Right click the Command Prompt shortcut and select Run as Administrator from the drop down menu. Type ipconfig /release in the command prompt. Wait a few seconds for a reply that the IP address has been released. Type ipconfig /renew in the command prompt.

Mac OS X ipconfig - A.P. Lawrence ipconfig on Mac is not like the Windows command of the same name, but is still very useful. If you momentarily forget where you are at a Mac OS X terminal session, you might type 'ipconfig /all' or something equally Windowish. You will get a response: What is my IP? How to find your IP address on iPhone, Mac Apr 02, 2014

IPConfig - What is My IP? - Apps on Google Play

An ex-Apple PR, Karen's career highlights include interviewing Apple's Steve Wozniak and discussing Steve Jobs’ legacy on the BBC. Her focus is Mac, but she lives and breathes Apple. Recent IP Release, Renew, and Flush DNS - Blizzard Support

Aug 04, 2011

how do you release & renew IP addresses? | Mac Support Oct 05, 2002