Disabling IPv6 on MAC OS X
Mac OSX 10.5.x – 10.6.x
1. Open System Preferences
2. Choose Network
3. With AirPort selected on the left, click advanced on the bottom right hand corner. A new window will open up. Select TCP/IP and under Configure IPv6 select disable. Your screen will look like the screenshot below.
4. Select OK and then you will return to the Network Screen. Click on Apply which was previously not able to be selected. Repeat Step 3 With Ethernet selected on the left.
Mac OS X 10.7.x and Higher
1. Click on Spotlight in the top right of your screen. Type in Terminal. Open the first link, or the application link to open up the terminal.
2. Once in Terminal you will run the following commands:
sudo networksetup –setv6off Wi-Fi
sudo networksetup –setv6off Ethernet
*NOTE* These commands are case sensitive. Please type them in exactly and double check what you have entered. The first time you run the command it will ask you for a password to your Mac Account. This is also case sensitive!