Can't install mac os X on my MP
There is a problem with my Macbook pro 2011. I erased the SSD and I can't install Mac os X mountain lion.
it says "This copy of the install OS X Mountain Lion application is damaged, and can't be used to install OS X"
I tried to copy mac os x installation app that I downloaded from apple website and put it into a USB disk and plug the USB disk into the macbook. I copied the .dmg file to disk utility and install it from there. Then the 2 errors occured. First was a problem about the SSD that it was "Busy" and the Second error was error -61.
Please someone help me I just want to run this macbook again.
Earlier Mac models