Hi Guys,
immediately after boot holding the option key appears a gray locked icon, without holding the option key a flashing question mark on my Mac. So I need a advice how to unlock and install OSX on my mac. Should I go to Apple service store or I can do it on myself. I went through the tutorials like "bypass EFI" and "script for EFI" . Can I unlock my mac using the bypass tutorials? or this is not possible know?. Is there any other way to unlock?.
Seems as though you have tried erasing the hard drive thus the "?". So you have to bypass the EFI lock by flashing the chip which is in your case very simple. Get a pi, some F-F connector wires, and a 8 pin SOIC clip and follow my tutorial.
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