![]() ![]() For MacBook Air, MacBook Pro, or MacBook with non-removable battery-press and hold Shift + Control + Option + Power Button for 10 seconds.ģ.For iMac, Mac Pro/mini, or laptop with a removable battery-detach the power cable or take out the battery then press and hold the Power button for 5 seconds.Reset SMC (System Management Controller) on your Mac. Restart Mac then immediately press and hold Option + Command + P + R keys until you hear a second chime.Reset NVRAM (Non-volatile RAM) & PRAM (Parameter RAM).
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