Unable to connect WiFi on MacBook with "There was an error in Network Preference" error.

Hi,

Fix with Safe Mode

1. Restart your Macbook by holding down the Power button. When your Mac's switched off, hold down the Shift key. ... 
2. Continue to hold down the Shift key until the Apple logo appears, then release the key.
3. Once your device is in a safe state, restart it once more to solve this preference error on Mac.

This is happening with my macbook pro 2015 as well. I've tried all the above options - any advice?

Still can't turn on wifi, attempting to open network in system preferences = network preference error message

I'm having the same problem and can't turn on wifi and keep getting "network preference error"

Hi,

Try to check your MacBook Pro with Apple Diagnostics if it reports network related hardware error.

Use Apple Diagnostics to test your Mac - Apple Support

If it doesn't help or error is reported, contact Apple Support or take your MacBook Pro to your local retail AppleStore, Genius Bar or Apple Authorized Service Provider to be examined your MacBook Pro there.

Official Apple Support

Genius Bar Reservation and Apple Support Options - Apple

Find Locations

Apple Repair and Repair Status Check - Official Apple Support

I am trying to resolve this exact problem on another Mac, with no success. Was a solution ever found? I've tried everything.

For MacBook Pro models before 2016 models (2016 and later featured USB-C ports) This device can provide for easy connection to your Router in the same room with a short Ethernet cable:

Apple USB Ethernet Adapter US$29.00

.

Just keep restarting until it Wi-Fi comes back on. Worked on my 2015 MacBook Air

Did you really download a copy of MacOS from "a third party site"? MacOS from somewhere other than DIRECTLY from Apple come complete with Malware, already pre-installed.

By far the easiest way to cause poor performance, instability, overheating and crashing is to install ANY third-party speeder-uppers, Cleaners, Optimizers, or Virus scanners, Bit Torrent, or a VPN that you installed yourself.

are you running anything like that?

Did you try booting into Recovery, invoking Disk Utility from the Utilities Manu, and repairing the disk?

if suggestions here have not helped, contact Apple support:

Official Apple Support

Please let as know if it indeed a hardware problem

I'm facing the same problem with my macbook 2015 pro

What if this just keeps happening? It is!

Network preferences error

Did you really just keep on restarting your laptop til it worked again?