I am trying to create bootable media so I can image 20+ macs with an image that I created from another machine. The mac I used to create the image already has all the applications and settings I want to have on the other 20+ macs. I see all kinds of tutorials on creating bootable media for Yosemite. However, none that I can find, have instructions on using the image I have already created. Does anyone know of a way to do this efficiently?