Hi everyone, 2012 MBP a1278 i5, bought used and deleted recovery partition thinking to make a usb boot drive with Mountain Lion for a clean install.The mac will not install this osx, it begins, gray apple screen and shuts off. Tried same with Mavericks, same result. Both are confirmed to be install esd.Hard drive cable is fine, hard.drive and ram are fine. These MBP's only have the recovery partition and no discs. I read somewhere that this machine comes with Lion that has proprietary drivers, and the machine would only accept a fresh install of Lion to get it up and running, then uprades could be made from there.Internet recovery does not work, says to restart application with same result each time. I am downloading Lion on a separate mac now and plan to attempt reinstalling Lion from a Bootable usb. Will this work, have any of.you heard of this before? I searched and could not find any info here. Any and all input muchly appreciated, Thanks!