I present you my probem, i'm at the limit of the abandonment ...
I've restore with TransMac the dmg image of Niresh yosemite
My computer do not support the direct booting from usb, I boot in first time SuperGrub portable with a DVD
I select Niresh install, but after one or two minutes the programm cancel and go back to chameleon >_<'
I try with verbose bootflag but same result
I haven't find anything on forums about that probem, If you could help me in my quest, i will be very happy and very grateful :-)