How do I disable IPv6 on Mac OS X?

The University has noticed that some Apple computers have experienced issues connecting reliably to the UNC wireless network.  Turning off the IPv6 protocol may reduce the occurrence of these issues.  To do so please follow the instructions based on your version of Mac OS X.

 

Mac OS X (10.7.x, 10.8.x, 10.9.x, 10.10.x, and 10.11.x)

In order to disable IPv6 in this OS version, you will need to run a command through the Terminal application.  Please note that any changes to the network preferences may revert this setting and the command may need to be run again.  Locations are affected by this change as well.

Open Terminal

  1. Open Finder
  2. Click on Applications
  3. Click on Utilities Folder
  4. Double Click on Terminal.app
    Run the following command on the terminal window
    10.7.x – 10.11.x 10.10.3
    networksetup -setv6off Wi-Fi networksetup -setv6off “Wi-Fi”

    1-OSX-108-Termnl

Turn Off IPv6

  1. Choose Apple menu
  2. Choose System Preferences
    2-0SX-108-AppleMenu
  3. Click Network.
    • If the Network Preference is locked, click on the lock icon and enter your Admin password to make further changes.
    • Click Unlock

    OSX-108-lock
    OSX-108-LockAuth

  4. Choose Wi-Fi.
  5. Click Advanced, and then click TCP/IP.
  6. Click on the Configure IPv6 pop-up menu and verify it is set to Off.
    4-OSX-108-Off

Mac OS X (10.5.x and 10.6.x)

  1. Choose Apple menu
  2. Choose System Preferences
    1-OSX-106-AppleMenu
  3. Click Network.
    • If the Network Preference is locked, click on the lock icon and enter your Admin password to make further changes.
    • Click OK


    OSX-106-Lock

    OSX-106-LockAuth

  4. Choose AirPort.
  5. Click Advanced, and then click TCP/IP.

    3-OSX-106-Advandced
  6. Click on the Configure IPv6 pop-up menu (typically this is set as Automatically) and click Off.
  7. Click OK and Apply (to apply the change).
    4-OSX-106-Off