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Fix: Mac OS X High Sierra Upgrade – No WiFi Internet After

Fix: Mac OS X High Sierra Upgrade – No WiFi Internet After

If you recently upgraded to Mac OS X High Sierra (10.13.1), you may not be able to connect to the Internet (over Wi-Fi or Ethernet) including unable to browse web pages or open the App Store. Additionally, your Mac will display “green” in System Preferences and show a connected Wi-Fi signal indicating you have a network connection, however you cannot reach the Internet. The issue is likely related to corrupt network preference files from the previous version of Mac OS you upgraded from. Follow the steps below to reset your network settings.

 

Note: Removing and re-adding the network connection in network preferences does not work.

 

  1. On your Mac, select from the Finder Menu Go -> Go To Folder… and type in the following path. Hit Go.
 
/Library/Preferences/SystemConfiguration

 

Mac high sierra network preferences files

 

  1. Delete the following files in the SystemConfiguration folder. You may be prompted to enter your Mac OS X password.
 
com.apple.accounts.exists.plist
com.apple.airport.preferences.plist
com.apple.network.eapolclient.configuration.plist
com.apple.smb.server.plist
NetworkInterfaces.plist
preferences.plist

 

Mac high sierra delete network settings preferences

 

  1. Restart your Mac.




 

Try to connect to either Wi-Fi or an Ethernet cable and accessing the Internet. This should resolve your Mac OS High Sierra Upgrade Internet connection issues.

 

Please use the comment form below to let us know if you are experiencing the issue.

 


* Please use the comment form below to let us know if you experience issues, have questions, or can provide solution. We want and encourage feedback. *



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Comments

Steve on Wednesday, 15 November 2017 13:17

Didn't work....help!

Didn't work....help!
Antoon on Friday, 17 November 2017 14:37

Above procedure does not work...
Who can help please to solve this nasty issue?
Antoon

Above procedure does not work... Who can help please to solve this nasty issue? Antoon
Pieter Jordens on Monday, 20 November 2017 10:34

It worked for me like a charm. Thanks!

initially after upgrading it worked fine for a few days and then all of a sudden my network (ethernet and WiFi was lost. But it is back now.

Thanks again.

Pieter

It worked for me like a charm. Thanks! initially after upgrading it worked fine for a few days and then all of a sudden my network (ethernet and WiFi was lost. But it is back now. Thanks again. Pieter
bob on Monday, 20 November 2017 13:26

Awesome fix! Thank you

Awesome fix! Thank you
Dawn on Tuesday, 21 November 2017 18:24

This solution did not work for me, but deleting a kext file from some old internet protection software (in my case NetNanney) that was imported from my previous MAC did. From Finder, select Go, and type in Library/Extensions. You will see kext files there. If you don't want to delete the file(s), another user said moving the file(s) to EFI/Clover/Kexts/Other worked for them. I cannot verify this as I simply trashed mine. Hope this helps someone out!

This solution did not work for me, but deleting a kext file from some old internet protection software (in my case NetNanney) that was imported from my previous MAC did. From Finder, select Go, and type in Library/Extensions. You will see kext files there. If you don't want to delete the file(s), another user said moving the file(s) to EFI/Clover/Kexts/Other worked for them. I cannot verify this as I simply trashed mine. Hope this helps someone out!
Anonomous on Wednesday, 22 November 2017 11:16

It worked for me on a early 2015 MBA with Intego virus barrier.

It worked for me on a early 2015 MBA with Intego virus barrier.
Darnell on Sunday, 26 November 2017 01:12

Thanks for the advice about the Kext file. I had a netnanny kext file. After I deleted it everything went back to normal.

Thanks for the advice about the Kext file. I had a netnanny kext file. After I deleted it everything went back to normal.
Mahesh Shanmugam on Sunday, 26 November 2017 16:53

Thank you! Worked like a charm. Thanks

Thank you! Worked like a charm. Thanks
Steve on Monday, 27 November 2017 19:01

Thank you Dawn! I found the NetNanny kext file and deleted it and lo and behold everything started working again. I spent well over an hour with Apple Support and no luck solving the issue. They told me I had to take my computer in to the Apple Store to fix it. You saved me a lot of hassle. Thanks again!

Thank you Dawn! I found the NetNanny kext file and deleted it and lo and behold everything started working again. I spent well over an hour with Apple Support and no luck solving the issue. They told me I had to take my computer in to the Apple Store to fix it. You saved me a lot of hassle. Thanks again!
DW on Tuesday, 28 November 2017 08:09

Worked for me with the addition of deleting the kext files.

Worked for me with the addition of deleting the kext files.
Kip on Wednesday, 29 November 2017 20:06

it worked! thank you so much. I was crawling around everywhere for hours looking for what might have happened.

it worked! thank you so much. I was crawling around everywhere for hours looking for what might have happened.
Violet on Thursday, 30 November 2017 19:29

I have done the go to folder and trashed those files and emptied the trash, a couple of times with Apple Support Tech guiding me. Some recovery and reinstalling and nothing seems to help. I am still without internet. I too spent 3 1/2 hours with Apple Support last night. So frustrated ...but I see I am not alone. I am on late 2009 iMac Desktop and tried to install OS High Sierra on Wednesday....now no internet.

I have done the go to folder and trashed those files and emptied the trash, a couple of times with Apple Support Tech guiding me. Some recovery and reinstalling and nothing seems to help. I am still without internet. I too spent 3 1/2 hours with Apple Support last night. So frustrated ...but I see I am not alone. I am on late 2009 iMac Desktop and tried to install OS High Sierra on Wednesday....now no internet.
Michael on Thursday, 30 November 2017 20:17

Also note that there are 2 extension folders
MacintoshHD/System/Library/Extensions
MacintoshHD/Library/Extensions

Also note that there are 2 extension folders MacintoshHD/System/Library/Extensions MacintoshHD/Library/Extensions
David Haswell on Sunday, 03 December 2017 03:44

To my surprise this has sorted out my WiFi internet connection problems. Can someone tell Apple and get them to sort it before others suffer this problem.

To my surprise this has sorted out my WiFi internet connection problems. Can someone tell Apple and get them to sort it before others suffer this problem.
Trysha on Tuesday, 05 December 2017 23:45

This worked immediately on my late-2011 Mac when I updated to High Sierra and couldn’t connect to the internet. Every time I update my OS over the last 3 years, I’ve been sans internet after every install. Thanks for saving me hours of calls to Apple. It’s a Christmas miracle!!!

This worked immediately on my late-2011 Mac when I updated to High Sierra and couldn’t connect to the internet. Every time I update my OS over the last 3 years, I’ve been sans internet after every install. Thanks for saving me hours of calls to Apple. It’s a Christmas miracle!!!
Amy on Saturday, 09 December 2017 17:47

Deleting those kext files did it! I have been going crazy with this! Thank you!!!!

Deleting those kext files did it! I have been going crazy with this! Thank you!!!!
Jonw on Sunday, 10 December 2017 12:57

Well that worked - am amazed - but why can’t Apple fix this ridiculous mistake??

Well that worked - am amazed - but why can’t Apple fix this ridiculous mistake??
Bob on Sunday, 10 December 2017 17:15

This worked like a charm for me after so many other options hadn't. Basically you had me remove a few additional files before rebooting, and whatever extra ones I deleted made the difference vs. what everyone else suggested.

Thanks!

This worked like a charm for me after so many other options hadn't. Basically you had me remove a few additional files before rebooting, and whatever extra ones I deleted made the difference vs. what everyone else suggested. Thanks!
Pat on Monday, 11 December 2017 14:19

Used Dawn’s fix posted on 11/21/17 with one small adjustment... had to go to System/library/extensions and delete 1 NetNanny kext file from that folder.
did the trick for me! Thank you Dawn!

Used Dawn’s fix posted on 11/21/17 with one small adjustment... had to go to System/library/extensions and delete 1 NetNanny kext file from that folder. did the trick for me! Thank you Dawn!
A210082@gmail.com on Wednesday, 13 December 2017 12:46

Thank you!!!!!!
Doing the top fix and deleting netnanny kext file in System/Library/Extensions worked!!!

Thank you!!!!!! Doing the top fix and deleting netnanny kext file in System/Library/Extensions worked!!!
GB on Thursday, 14 December 2017 20:57

Deleting the Net Nanny ktext files and ALL of my system/library extension files finally got me connected again. thank you to the hero that discovered this

Deleting the Net Nanny ktext files and ALL of my system/library extension files finally got me connected again. thank you to the hero that discovered this
Ian on Saturday, 16 December 2017 09:21

worked for me - thanks
everything back up and working

worked for me - thanks everything back up and working
Joe on Saturday, 16 December 2017 13:30

Hmm... this worked great for about 2 minutes. After my connection stopped working again, I navigated back to the folder and of the 6 files I had deleted had returned.

Hmm... this worked great for about 2 minutes. After my connection stopped working again, I navigated back to the folder and of the 6 files I had deleted had returned.
Mark on Monday, 18 December 2017 12:01

This did not work for me. I did not see the above referenced kext file. I tried a PRAM reset, SMC reset, nothing has fixed this. My Wi-Fi connection status is green but when I try to go to a website in Safari it acts like I have a really slow connection but never times out. It seems to connect briefly to the internet when coming out of sleep mode because it will update my mail and messages. But when I try to open an email message it is blank. I have two other newer Apples on High Sierra that work just fine.

This did not work for me. I did not see the above referenced kext file. I tried a PRAM reset, SMC reset, nothing has fixed this. My Wi-Fi connection status is green but when I try to go to a website in Safari it acts like I have a really slow connection but never times out. It seems to connect briefly to the internet when coming out of sleep mode because it will update my mail and messages. But when I try to open an email message it is blank. I have two other newer Apples on High Sierra that work just fine.
Jane on Friday, 05 January 2018 08:51

This worked for a few days, but today it's not working. I've gone back in and deleted these files, but once I restart, the files come back. Any suggestions?

This worked for a few days, but today it's not working. I've gone back in and deleted these files, but once I restart, the files come back. Any suggestions?
Brent on Saturday, 06 January 2018 22:13

NetNanny the culprit!!!! Thanks so much for this info.

NetNanny the culprit!!!! Thanks so much for this info.
Rob on Friday, 12 January 2018 23:39

Worked like a charm and only involved a few steps - thanks so much!

Worked like a charm and only involved a few steps - thanks so much!
Jas on Sunday, 14 January 2018 07:38

It was very strange, I had this problem and could only connect to the internet with my VPN software. When I killed the VPN, it wouldn't work. I tried the solution at the top which didn't work and then I tried deleting the Kext files and it worked! Finally got my internet back again! Thank you!

It was very strange, I had this problem and could only connect to the internet with my VPN software. When I killed the VPN, it wouldn't work. I tried the solution at the top which didn't work and then I tried deleting the Kext files and it worked! Finally got my internet back again! :) Thank you!
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Friday, 19 January 2018
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