mathiashyun

Q: 169.254

I can't connect to my WiFi at home. I have tried to restart the network settings but i keep getting the message that my WiFi has self assigned its IP address to 169.254.xxx.xxx

MacBook Air, OS X El Capitan (10.11.6)

Posted on Aug 6, 2016 8:01 AM

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Q: 169.254

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  • by lllaass,

    lllaass lllaass Aug 6, 2016 8:05 AM in response to mathiashyun
    Level 10 (189,493 points)
    Desktops
    Aug 6, 2016 8:05 AM in response to mathiashyun

    That means the Mac can't get an IP address from the network/router.

    Do other devices now successfully connect to the router/network?

    Have you powered off and then back on your router?

  • by mathiashyun,

    mathiashyun mathiashyun Aug 6, 2016 8:10 AM in response to lllaass
    Level 1 (5 points)
    Desktops
    Aug 6, 2016 8:10 AM in response to lllaass

    I began behaving like this today...
    Yeah all other devices, such as IMac's, MacBooks, TV's, PS4's and such connects without any problems at all.
    Already tried to power off the router and Macbook without any luck..
    Even tried to delete the /library/preferences/systemconfiguration, but the OS system won't allow me anymore, even though several guides to reset network settings, tells me to... I'm out of options of what to do.

  • by lllaass,Apple recommended

    lllaass lllaass Aug 6, 2016 8:35 AM in response to mathiashyun
    Level 10 (189,493 points)
    Desktops
    Aug 6, 2016 8:35 AM in response to mathiashyun

    - Try resetting the SMC and NVRAM/PRAM

    Intel-based Macs: Resetting the System Management Controller (SMC)

    https://support.apple.com/en-us/HT201295

    About NVRAM and PRAM 

    https://support.apple.com/en-us/HT204063

    - Try starting in Safe Mode

    OS X: What is Safe Boot, Safe Mode?

    https://support.apple.com/en-us/HT201262

    - Boot to Recovery and repair the startup disk

    OS X: About OS X Recovery - Apple Support

    https://support.apple.com/en-us/HT201314

    - If it is repairable reinstall the OSX

    How to reinstall OS X on your Mac - Apple Support

    https://support.apple.com/en-us/HT204904

  • by Tesserax,

    Tesserax Tesserax Aug 6, 2016 10:42 AM in response to mathiashyun
    Level 9 (54,645 points)
    Wireless
    Aug 6, 2016 10:42 AM in response to mathiashyun

    Try the following on your Mac in order, until (hopefully) resolved:

    1. Create a New User Account
      • System Preferences > Accounts
      • Click "+" to add a new account.
      • Log off, and then, log back on with the new user account.
      • Try connecting to a Wi-Fi network with your Mac's AirPort.
      • If this resolves the problem, there may be something amiss with your current profile and will require further troubleshooting.
      • If this does not resolve the problem, go ahead and log back into your normal account and go on to the next step.
    2. Delete AirPort Keychain Entries
      • Launch the "Keychain Access" application located in Applications/Utilities.
      • In the windows on the left side: Select login for Keychains and "Passwords" for Category.
      • Click on the "Kind" filter at the top, and look for any "AirPort network password" entries...and delete them.
      • Close Keychain Access.
    3. Delete Preferred Network(s)
      • System Preferences > Network > Wi-Fi > Advanced > Wi-Fi tab
      • Delete all entries under "Preferred Networks."
      • Click on OK.
    4. Add Preferred Network(s)
      • System Preferences > Network > Wi-Fi > Advanced > Wi-Fi tab
      • Add the preferred network(s) using the "+" button.
      • Click on OK.
      • Restart or log out, and then, back in.
        • If it works, then you are done.
        • If not, go on to the next step.
    5. Move System Configuration Files

      Step 1

      • In Finder, go to /Macintosh HD/Library/Preferences/SystemConfiguration
      • Move (not copy) the preferences.plist file to the OS X desktop.
      • Restart the computer.
      • Verify if you have connectivity. If not, go to the next step.

      Step 2

      • In Finder, go to /Macintosh HD/Library/Preferences/SystemConfiguration
      • Move (not copy) the NetworkInterfaces.plist & com.apple.airport.preferences.plist files to the OS X desktop.
      • Restart the computer.
      • Verify that you have connectivity. If not , go to the next step.

      Step 3

      • In Finder, go to /Macinstosh HD/Library/Preferences/
      • Move (not copy) the entire SystemConfiguration folder to the OS X desktop.
      • Restart the computer.
      • Verify that you have connectivity. If not, go to the next step.