Install custom script & create hotkey in maya 2015, MAC OS X

How to install a custom script in maya, this script, MirrorMe duplicates the mesh over to the other side, (a better symmetry function that maya default). List of scripts used: Copy paste your script into this folder: /Users/YOURCOMPUTERNAMEHERE/Library/Preferences/Autodesk/maya/2015-x64/prefs/scripts My case: /Users/KO/Library/Preferences/Autodesk/maya/2015-x64/prefs/scripts (open terminal window, and type OPEN then paste directory path in) Load and read mel/python command: Source