Wi-Fi connection but no ethernet

Make a New Location, Using network locations in Mac OS X ...

http://support.apple.com/kb/HT2712

System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.

System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.

The interface that connects to the Internet should be dragged to the top of the list.

Sys Prefs>Network>highlight the Interface you're using>Advanced>TCP/IP>Configure IPv4: Using DHCP.

System Preferences>Network>choose interface>Advanced>Proxies Tab, make sure none are set, like for HTTP & HTTPS.

System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...

8.8.8.8

8.8.4.4

1.1.1.1

9.9.9.9

Apply.

Uninstall Avast per their directions then run etrecheck again to see what chaff it left.

On AVG & Avast…

https://x704.net/bbs/viewtopic.php?f=17&t=8803&p=115715&hilit=avg#p115715

https://discussions.apple.com/thread/251454104?answerId=252862395022#252862395022

They always leave stuff behind.

EtreCheck is a simple little diagnostic tool to display the important details of your system configuration and allow you to copy that information to the Clipboard. It is meant to be used with Apple Support Communities to help people help you with your Mac. It will not display any personal info.

https://www.etrecheck.com/

Pastebin is a good place to paste the whole report if you capture the URL while there…

https://pastebin.com/

Workable but harder for me to work with...the Note tool on the bottom of this editor's toolbar, as shown in the image, to copy and paste the output from EtreCheck. In a Reply before you click post, look for this to add longer texts...

I'm having the same issue as Bud. My Ethernet isn't working. Worked fine for two years, and then a week ago, it stopped working. I bought a replacement Apple and I continue to get an error message saying, Connected. Ethernet Adaptor (en3) has a self-assigned IP address and will not be able to connect to the Internet.. I tried the suggested fix, but it's still not working. I'm running Norton. Any ideas why my Ethernet isn't working. Thank you. I appreciate any help!

My MacBook Air is two (maybe three?) years old so I don't think there is a hardware issue, although it's possible I'm wrong. This is the problem I'm having with it other than after updating to the new iOS, it crashes every so often but that hasn't happened in about two months or so. I rebooted the computer with the ethernet attached to it and left it on automatic settings and it reset it. Fingers crossed that works. Good luck with yours!! Would you mind posting an update and I'll do the same in a few days?

My opinion is that it does no good at all, only interferes or scares you.

Apple does a pretty good job of protecting you.

If you feel the need I recommend The free Malwarebytes which may take care of it...

https://www.malwarebytes.com/mac/

Ethernet in the new location, whichever Interface you want to use for Internet needs to be at the top.

Any luck yet?

What is the IP, 169.x.y.z?

Are you running any VPN, Anti-Virus, or Cleaning apps?