When it starts, a blank white screen pops up. I was trying to update the 4 all software and hard drive was erased. It needs to be reinstalled. Command/Power/R will prompt it internet recovery, which, in our case it completes it because it is connected to our network. Once you recover it, it will ask for the installation of Mac OS X Lyon from a source (CD, SD). We don't recall the Ram or HD capacity Charger and case included
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