More details about IPv6 here: https://support.nordvpn.com/hc/en-us/articles/115000087325
In order to disable IPv6 on newer OS X versions, 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.
- 1. Open Finder
- 2. Click on Applications
- 3. Click on Utilities Folder
- 4. Double Click on Terminal.app
- 5. Run the following command in the terminal window:
This will list all of your network interfaces and their names.
- 6. Identify the network interface you are using, most commonly Ethernet or Wi-Fi. Use the following command in the terminal window to disable IPv6 on that interface. Please note that you may have to use quote marks to envelope the interface name. A few examples:
networksetup -setv6off Ethernet
networksetup -setv6off “Wi-Fi”
You will be prompted to enter your OS X administrator password. Afterwards, IPv6 will be disabled.
While usually not necessary, if you wish to re-enable IPv6 on your device, you can simply run this command in the terminal:
networksetup -setv6automatic Wi-Fi networksetup -setv6automatic Ethernet