Mac's SMC is responsible for managing underlying functions such as batteries, fans, and power supplies. When encountering hardware problems, it can be solved by resetting the SMC. 1. Apple Silicon Mac (such as M1 and M2): Wait for 30 seconds after shutdown before turning on; 2. Intel Mac equipped with T2 chip: Press and hold Control Option Shift after shutdown and press the power button, hold it for 7 seconds before rebooting; 3. Old Intel Mac without T2 chip: The laptop needs to unplug the power supply and hold Shift Control Option and power button at the same time for about 10 seconds, and the desktop computer will be powered off and wait for 15 seconds before turning on the power directly. The model should be confirmed before operation to avoid errors. If it is invalid, it is recommended to check the hardware further or contact Apple Support.

Mac's SMC (System Management Controller) is responsible for managing many underlying functions, such as battery management, fan control, power button response, etc. If your Mac has strange hardware-related problems, such as charging, fan spinning, sleep abnormalities, etc., resetting the SMC is a common and effective troubleshooting method.

The following is a description of how to correctly reset the SMC according to different types of Macs:

Macs using Apple Silicon chips (such as M1, M2, etc.)

This type of Mac does not have the traditional "power key" or the SMC reset method that can be operated separately, but it is actually simpler:

• Power off directly : Click the power icon in the menu bar, select "Shut down", or hold the power button until the sliding shutdown interface appears.
• Wait for 30 seconds before turning on the computer.

Because the SMC of Apple Silicon Mac will also remain partially in shutdown, you must wait enough time for the system to completely discharge. No key combinations or other tools are required.

Intel Mac with T2 security chip

This type of machine includes most Intel Macs released in 2018 and later, such as the iMac Pro, MacBook Pro with Touch Bar, etc. The operation steps are as follows:

1. Turn off the Mac.
2. Hold down the Control Option Shift three keys, then press the Power key, while holding these four keys for 7 seconds .
3. Release all keys and press the power button to start the computer.

This process seems a bit confusing, but it only takes one step at a time. It should be noted that these keys are on the left side of the keyboard, making it easier to operate with the left hand.

Old Intel Mac without T2 chip

Suitable for early MacBook, MacBook Air, or non-Retina models. The operation method is slightly different:

• If it is a laptop (with battery):

  • Unplug the power adapter first.
  • Press Shift Control Option and Power Keys at the same time, and then release after about 10 seconds.
  • Plug back into the power cord and turn on.

• If it is a desktop computer (such as an iMac or Mac mini):

  • Unplug the power cord.
  • Wait for 15 seconds before plugging in.
  • Press the power button to turn on.

This part of the operation is easy to be confused, especially the differences between different models are very large. It will be safer to confirm your model and then do it.

Basically these methods. Resetting the SMC is not complicated, but it is easy to have no effect because of the wrong order of operations. If the problem remains after trying, you may need to check the hardware further or contact Apple Support.

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