Traduction de l’étape 1
Étape 1

Does your MacBook have a T2 security chip?
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These MacBooks have a T2 security chip:
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MacBook Air introduced in 2018 or later
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MacBook Pro introduced in 2018 or later
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If it has a T2 chip you can reset the SMC as follows (if not, skip this step):
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Hold the "Control" and "Option" (Alt) on the left side of your keyboard and the "Shift" on the right side of your keyboard for 7 seconds.
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Then additionally press and hold the power button and keep holding all four keys for another 7 seconds, then release them.
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Press the power button after few seconds to turn on your MacBook.
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