I tried to assign a static IP to the mac mini, but its IP address remained the same ( 192.168.1.12).ĭisabling firewall on my router did not fix the problem too.

However, the ethernet connection kept dropping, was very unstable, and while the connection was there, the internet was still not working. On another occasion when I factory-reset the router, the mac mini was given an IP of 192.168.1.12. 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 port not working