What should I do?Īfter creating the USB drive to install High Sierra my laptop, a Lenovo Ideapad 300, will not boot to the installer, it just stops with a black screen and sits there. The only option at this point is hit the “ok” and reboot and then I got the same thing. I got a message that said “EFI USB Device has been blocked by the current security policy” I’ve tried step by step to install High Sierra on my Lenovo G50… no comprar enlaces Decemat 7:18 PM Reply.
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