To reset OSX Network preferences to system default follow below steps.
Step 01:
Reset location
The first thing you want to do is reset your location.
Go to System preferences > network, then in the top select location and then edit locations.



Use the (-) to delete the current location,
Use the (+) to add a new location,
With new location try to connect to your internet.
Step 02:
If Step 01 does not work completely reset your networking connections by going to:
Macintosh HD/ Library / Preferences /
Drag the ‘SystemConfiguration’ folder to the trash or just delete it but do not empty the trash just yet. You may need this folder in future.
Now Restart your computer.
Note: Don’t worry Mac will create new ‘SystemConfiguration’ folder with default settings & preferences. When you log back in all of your network and bluetooth connections will be reseted. Now try to reconnect to your network.
Tip: if Step 02 doesn’t work or doesn’t have an effect you can replace ‘SystemConfiguration’ folder with original folder which is currently in Trash to rollback previous network settings.
Hope it Helps,
Thanks & Regards
Mandar Apte
Thank you so much! I tried for weeks many different attempts and this was the winner!
thank you so much!!! this worked extremely well on my new macbook pro 13″ :)
Great. Thanks! It worked!
After hours of forum searches this was the only solution that worked like a charm!
Great ! this worked great on my macbook pro 2011 / yosemite : Deleting ‘automatic’ configuration and creating this one again worked like a charm.
Thank you for your help.
working perfect!! thank you!
Thank you very much !
worked great like a charm, thanks so much for this.
Thanks very much! I did step 01 and now it works perfectly! :D
Number 2 worked like a charm! Thanks for your help!
You are wonderful. Thanks a bunch!
It worked! You are the best. Many thanks
It didn’t work for me :(
Life saver! Thanks so much. Wish I had read this 8 hours ago!
You just saved my day! My ethernet doesn’t work after I restarted – now it works as normally.
Hi,
i can’t delete system configuration file it says that it’s required by osx.
Please help,
Thx,
Mohsen
Thanks so much! After 20 years of day job in front of a PC, I’m too burned out to deal with electronics at home. I took my macbook to Apple to be updated and when I got home it couldn’t find my internet! Aaargh!!!
I did Step 1 and it worked on the first try! I didn’t even have to restart! Thank you thank you thank you!!! :)
On MacBook Air 11″ Mid 2013 OSX 10.10.5 doesnt works.
Still having problems to connect to wifi
Perfect, Step 2 worked. Thank you so much.