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How to reset the SMC, PRAM and NVRAM on a Mac Desktop

  1. How to reset the SMC, PRAM and NVRAM on a Mac Desktop, SMC Reset: 步骤 1 中的图像 1,1
    • Follow these steps for iMac, Mac mini, Mac Pro, and Xserve.

    • Choose Apple menu > Shut Down.

    • After your Mac shuts down, unplug the power cord.

    • Wait 15 seconds.

    • Plug the power cord back in.

    • Wait 5 seconds, then press the power button again to turn on your Mac.

    • For Intel-based Xserve computers that aren't responding, you can shut down locally or by using remote commands. You can also press and hold the power button for 5 seconds.

  2. How to reset the SMC, PRAM and NVRAM on a Mac Desktop, PRAM/NVRAM Reset: 步骤 2 中的图像 1,1
    • Shut down your Mac.

    • Turn it on and immediately press and hold these four keys together: Option, Command, P, and R.

    • You can release the keys after about 20 seconds, during which your Mac might appear to restart.

结论

If you have done all of these resets with no luck, you can head on over to our Answers Forum and ask for more assistance there!

12等其他人完成本指南。

[deleted]

于08/28/18注册

26,112 声望

创作了21篇指南

2条评论

Nur zur Information: Beim "MAC" heisst das "Herunterfahren" - "AUSSCHALTEN"!!!

Walter Ludwig Soural - 回复

Tras la actualizar mi MacBook Pro 2018, al encender solo se queda en pantalla azul sin dirigirse a la pantalla de inicio ni mostrar el logotipo, a parte se enciende la touchbar pero solo muestra botones como los del volumen y la luz. Ayuda por favor.

Lissa Rivas - 回复

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