SMC won't reset. Is there another way?

My MacBook won't sleep without immediately waking up, and won't shut down without immediately restarting. I can turn it off by holding down the power button, but it still turns back on when the magsafe is plugged in.

It seems like I need to reset the SMC, but when I follow the instructions to do that (turn off computer, push left shift-control-option-power) it just turns on. Is there another way to reset the SMC, or is there something that I'm missing?

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So when i tryed first option. It didnt reset. My adapter is blinking green orange. My battery can be removed but ive tried to reset smc 100 times now and to now affect

by Andre Battle

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Depends on the age of your Macbook:

Resetting the SMC on Mac portables with a battery you can remove

1. Shut down the computer.

2. Disconnect the MagSafe power adapter from the computer, if it's connected.

3. Remove the battery.

4. Press and hold the power button for 5 seconds.

5. Release the power button.

6. Reconnect the battery and MagSafe power adapter.

7. Press the power button to turn on the computer.

Resetting the SMC on portables with a battery you should not remove on your own

1. Shut down the computer.

2. Plug in the MagSafe power adapter to a power source, connecting it to the Mac if its not already connected.

3. On the built-in keyboard, '''press the (left side) Shift-Control-Option keys and the power button at the same time.

4. Release all the keys and the power button at the same time.'''

5. Press the power button to turn on the computer.

Note: The LED on the MagSafe power adapter may change states or temporarily turn off when you reset the SMC.

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As I stated, this didn't work. Do you know of any alternatives, perhaps an internal button or battery I could pull?

by Eric

Since you have to hit keyboard keys at the same time as the jumper you'll need help. If you connected an external USB keyboard and shorted the PWR jumper at the same time as pressing the keys that might work.

by originalmachead

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Sure, you can trigger an SMC reset with the SmcFlasher tool.

  • Grab the appropriate SMC firmware update for your machine from Apple.
  • Locate and extract the SmcFlasher.efi from the firmware update package and tuck it somewhere on your system drive. The Pacifist tool is of great help here.
  • Next boot into an EFI shell such as the one included in the rEFInd boot manager, navigate to where you put the SmcFlasher.efi and run it with the parameters -reset 1

Let's say I put it in a folder named "smc" on the root of the system drive, I would then


cd smc

./SmcFlasher.efi -reset 1


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I have also tried to reset as per the instructions, but when I release the option/shift RP and power button, thr machine powers up without me being able to hit power button again. it then comes up in safe mode but because the keyboard doesnt work properly i cannot input my password. any ideas??

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Same problem here! Tried several times to reset with the Shift+Control + Option keys and Power Button.

No LED changes.

I would like to understand Royolse instructions better. Can anyone can help?

Thank you

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Royolses' instructions using rEFit to reset the SMC is no different than what you have done via holding the keys during boot up. As a reference here's the Apple T/N: Reset the System Management Controller (SMC) on your Mac. If you can get your system to boot up you could try checking your systems firmware using this Apple T/N: About EFI and SMC firmware updates for Intel-based Mac computers

I suspect you have a bigger problem here if neither of these fixes things. How about creating a fresh question with all of your systems details and a clear problem description.

by Dan

Thank you Dan.

I checked the page you linked...I have the roght SMC did a great job.

The very strange thing now it smetimes works (so screen gets darker after 1 min of inactivity and no fans crazyness...) THEN..without any reason... it stop doing it right...screen always bright.....

by stopcampioni

Are you sure your system is this series of MacBook? The older model has an inverter to power the CCF bulbs for the displays backlight Vs this model which uses LED's. It's not uncommon to have issues with the older backlight system as you have described here which is why I wanted you to create a fresh question.

by Dan

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Eric will be eternally grateful.