Help with Rooting Droid Razr ICS

[bukow1cm]

I have been trying to root this device for a while now. I have the 6.16.211.xt912 and have been unsuccessful at rooting this. I have a mac and really want to get to really utilize this device at its full potential. Any Root utility I have used i just end up getting permission errors or using motofail it doesnt connect to the device. HELP!