For Macs with Apple Silicon (M1, M2, M3, etc.), shut down, wait 10 seconds, press and hold the power button for 10 seconds, release, wait a few seconds, then press the power button to turn on the Mac. 2. For Intel-based Macs with Apple T2 Security Chip, shut down, press and hold the power button for 10 seconds, release, wait a few seconds, then press the power button to turn on the Mac. 3. For Intel-based Macs with non-removable batteries, shut down, connect the power adapter, press and hold Shift Control Option on the left side and the power button simultaneously for 10 seconds, release, then press the power button to turn on the Mac. 4. For Intel-based Macs with removable batteries, shut down, remove the battery, press and hold the power button for 5 seconds, reinsert the battery, and turn on the Mac. This process helps resolve power, battery, fan, or startup issues, and normal changes afterward include adjusted fan speeds or reset keyboard backlight behavior, and if problems continue, resetting NVRAM or PRAM or contacting Apple Support is recommended.
Resetting the System Management Controller (SMC) on a Mac can help resolve issues related to power, battery charging, fans, or startup behavior. The steps vary depending on your Mac's model, especially whether it has a T2 chip or uses Apple silicon (M1 and later). Here's how to reset the SMC based on your Mac type:

For Macs with Apple Silicon (M1, M2, M3, etc.)
Apple Silicon Macs don’t have a traditional SMC. Instead, the equivalent functions are managed by the integrated chip, and a regular restart usually handles most low-level resets.
To perform a reset:

- Shut down your Mac completely.
- Wait about 10 seconds.
- Press and hold the power button for about 10 seconds, then release.
- Wait a few seconds, then press the power button again to turn on your Mac.
This process resets the management controller in Apple Silicon Macs.
For Intel-based Macs with Apple T2 Security Chip
These include iMac (2018 and later), Mac mini (2018), Mac Pro (2019), MacBook Pro (2018 and later), and MacBook Air (2018 and later).

Steps to reset SMC:
- Shut down your Mac.
- Press and hold the power button for 10 seconds, then release.
- Wait a few seconds, then press the power button to turn on your Mac.
You don’t need to press any other keys—just the power button.
For Intel-based Macs with Non-Removable Batteries (Most MacBook models)
This applies to MacBook Air and MacBook Pro models where the battery is built-in and not user-removable.
Steps:
- Shut down your Mac.
- Connect the power adapter.
- On the keyboard, press and hold Shift Control Option on the left side and the power button at the same time.
- Hold all four keys for 10 seconds, then release.
- Press the power button to turn on your Mac.
For Intel-based Macs with Removable Batteries (Older models)
This mainly applies to very old MacBook models (pre-2009), which are now rare.
Steps:
- Shut down your Mac.
- Remove the battery.
- Press and hold the power button for 5 seconds.
- Reinsert the battery.
- Turn on your Mac.
Always make sure your Mac is plugged in when performing an SMC reset, unless instructed otherwise. After the reset, you may notice changes like fan speed adjusting, keyboard backlight behavior resetting, or different startup chime timing—this is normal.
If problems persist after resetting the SMC, consider resetting the NVRAM or PRAM as well, or contact Apple Support.
Basically, the method depends on your Mac's chip type—just power button hold for Apple Silicon and T2 Macs, and key combinations for older Intel portables.
The above is the detailed content of How to reset the SMC on a Mac?. For more information, please follow other related articles on the PHP Chinese website!

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