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- Jan 31, 2016
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I have a macbook pro Core i7" 2.0 15 that has refused to work, when i switch it on all i get is a flashing folder with question mark icon, i have tried installing the El-captin OS x through a flash USB drive made bootable using TRANSMAC, POWER ISO..etc but none of them worked. please any one with a workable solution on how to do this. when i make a bootable USB, i plug it in, switch on the mac, press down option button but the USB drive doesn't show out.