Can't turn off IPv6
I have been having problems with wifi on my Macbook Air 4,2 and I wanted to try turning off IPv6. However, when I go to network settings to do so, the option to turn it off is not there. I've included a screenshot to show you what I see when I go to network settings. I don't know why this option would have disappeared. Is there a program that could have disabled this?
Thanks,
Spencer
MacBook Air, Mac OS X (10.7.3)