Hello, I have a problem with installing yosemite on Macbook Air 2008
I made a bootable pendrive the way it showed it, but after turning it off and turning it on while holding alt. I choose the pendrive and X pops up and after a while the computer turns off. Anyone have an idea?
I made a bootable pendrive the way it showed it, but after turning it off and turning it on while holding alt. I choose the pendrive and X pops up and after a while the computer turns off. Anyone have an idea?

