Hi there! i am new to this forum and was wondering if anyone could help. I am trying to root my Samsung Galaxy S4 (demo unit, built number I9505XXXUAMDE_LLK) on my MAC using MOTTOCHOPPER.ZIP file in the terminal. I typed in cd desktop (hit enter); cd motochopper (hit enter); chmod 755 * )hit enter) and then I typed sh run.sh and hit enter. I tried to root it but at the end it says FAILURE. Can anyone help?