I watched this video countless time since last Friday the .sh (1:39 mark) file is never found in my folder, that is the deal killer that stops me from going forward.Download the refind file for OS X and follow the instruction of this video
Basically, download refind, open up the terminal, type sudo then space, and then drag the install.sh file from the download folder into the terminal and hit enter.
You will be asked for your password, eneter it and press enter. That's all there is to it.