Fixing Wifi Problems on MacOS (Yosemite / Sierra) – Connected to Wifi But No Internet…

MacOS users : Bookmark this page on your phone – someday it will save you a bucket load of hassle!

Recently I have experienced a few problems with the Sleep / Wake function of one of my drives that then causes MacOS to restart.

Unfortunately sometimes that still does not wake up the drive and it needs powered down and restarted, then MacOS needs Shut down, left for a moment and restarted.  Thankfully that process seems to be sorting out the hard drive issue, however it also seemed to bring another problem with it.

Following the shut down and restarting of the computer it appears that the wifi has connected without issue, but I have no internet connection.  Nothing.  No Internet, no email, no connections of any kind.  No amount of restarting, rebooting or waiting would solve it.  No amount of disconnecting the wifi rescanning, trying to connect to the iPhone as a hotspot would bring my internet activiites back to life.  So how do you fix it?

You need to do some deleting…

  • Turn off Wi-Fi from the menu bar.
  • Navigate to /Library/Preferences/SystemConfiguration/ in Finder by pressing ⌘ + Shift + G.
Finding the System Configuation Folder in MacOS
Finding the System Configuation Folder in MacOS
  • Select the following files:
    • (does not appear to be present in MacOS Sierra – so if you can’t find it, don’t panic)
    • NetworkInterfaces.plist
    • preferences.plist
  • Copy these files in a safe location so that if anything gets messed up, you can easily restore them.
  • Delete the files.
  • Reboot your Mac and enable Wi-Fi again.

There you have it everything will be back to 100%.

(People have also reported that this course of action will solve all sorts of wifi / internet issues such as slow connection, disconnections and not being able to get online at all).


About The Author

I am a road race loving, adventure motorcyclist, with a huge bit of techie built in.  I am currently trying out a bit of photography.

Motorcycling | Technology | Photography

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