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Antwoord op "I'd like to reinstall firmware"there is no EFI update for my model, which is macbook 6.1 :((((((((( shame to apple, since my device was produced apple haven't updated the EFI !
Antwoord op "Will not fully boot"try to reset it using fn+control+shift+power button . press all simultaneously, when system start butting press alt/option too while holding those buttons, this should turn it of. after what push the power button to turn it on. after system full butting, turn it off and do SMC