Solve Mysterious MacBook Pro Ethernet Cable connection issue
TL;DR I have MacBook Pro 2018. The ethernet cable connection was not working. Searched days of internet and I could not find useful solutions. I ended up solving this by run diagnose when rebooting.
So the problem was caused by:
- The adaptor
- The local network
- The latest updates of MacOS 10.15.5
- The network location settings
- The ethernet adaptor drivers
The problem was due to the local MacOS settings. I don’t know enough to the details but I solved this issue by run Diagnostics when rebooting.
Per Apple document:
“Turn on your Mac, then immediately press and hold the D key on your keyboard. Keep holding until you see a screen asking you to choose your language. When Apple Diagnostics knows your language, it displays a progress bar indicating that it’s checking your Mac: Checking your Mac takes 2 or 3 minutes.”
After running this Diagnostics tool, I could connect to ethernet cable with Plug-n-Play:
