And now I am not even able to reproduce this at all. After the password was configured, it stopped working and went back to saying it has self-assigned the IP. On one occasion when I factory-reset the router, the mac mini was successfully given an IP from the router, and everything worked briefly until I configured WPA2 password. I connected the mac mini directly to the modem using cat6 cable, and the internet worked this way, but I am not sure if I can rule out the mac mini's hardware being faulty based on this evidence. To see if the mac mini's NIC is even functioning.

So I changed DHCP settings in the router so that the router will assign a static IP address to the mac mini's MAC address. (Note that when I got a new macbook pro a few years ago, I had the same issue, and Renew DHCP Lease is what fixed the issue)Īfter hours of googling around, I realized that this issue is potentially caused by the router's DHCP server not giving the mac mini a correct IP. I did try hitting Renew DHCP Lease button a number of times, and reset the network configurations, followed by a few re-booting. plst files in the preferences directory and re-booted the mac mini, but this didn't do anything too. I factory-reset the router and also did a fresh install of OS on the mac mini, which didn't solve the problem at all.Īs recommended by a few online articles on this issue, I also deleted some of those. I can also confirm that all ports on the router and the cables (cat6 cable on asus dual band gigabit router) I tried are not faulty as they all worked on my other laptop and desktop (windows and ubuntu). I re-booted the mac mini as well as the router a number of times, which did not do anything. Here are the things I've tried that did not fix the problem.

If I use the wifi, however, everything works as expected. I plugged in a cat6 cable into the mac mini's ethernet port and connected it to the wireless router, but it won't connect to the internet, saying that it has self-assigned the IP address. I just bought a 2020 Mac Mini with 10 gigabit ethernet.

Mac ethernet not working 2020