I had been using PdaNet, but I heard EasyTether might be a better choice, so I tried to install it. However, now PdaNet won't work. When I try to connect from my MacBook, I keep getting the message "Unable to open interface (e00002c5)." I found some suggestions, but yielded no result. I tried cd /System/Library/Extensions/ kextunload EasyTetherUSBEthernet.kext But it only tells me that "You must be running as root to unload kexts, terminate services, or remove driver personalities." I've tried uninstalling and reinstalling both PdaNet and EasyTether, but no avail. Does anyone have any other suggestions? Or should I repeat the steps again in a different way? Thank you!