You seem super smart...why did you dig up a 2 year old thread?
LOL! I didn't notice how old it was. My mom got a notice that another device on her network was using the same IP address as her Macbook Pro. I was googling for the terminal command to force the router to assign a new IP address to her machine (because I don't have that kind of minutiae memorized), and I saw this. I was flabbergasted by the stupid response and decided to post a clarification response. I never checked the age of the thread.
By the way, it is obviously still a relevant thread, as it is still coming up near the top of the search results for a duplicate IP address on a Mac.
In case anyone is interested in the answer...
- Click on the "Applications" folder.
- Click on the "Utilities" folder.
- Click on the "Terminal" application.
- Type... "sudo ipconfig set en1 dhcp" in the terminal window.
- Enter your system password.
The Mac will request a new IP address from the DHCP server and you will be golden.
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Phillip H. Blanton
Akanomi Softworks