To reset the System Management Controller (SMC) on your MacBook Pro M4, which likely refers to a model with an M4 chip (though specific models are not detailed), you should follow these steps. Since the MacBook Pro models with M-series chips do not have a removable battery, you will use the method for non-removable batteries. Here's how to do it:
1. Shut Down Your MacBook: Start by shutting down your MacBook Pro. You can do this by going to the Apple menu and selecting "Shut Down," or by pressing and holding the power button until it turns off.
2. Connect the Power Adapter: Ensure your MacBook is connected to a power source using the MagSafe power adapter. This is important for the reset process.
3. Reset the SMC: With your MacBook still powered off, locate the following keys on your built-in keyboard: Shift, Control, and Option. For most MacBook models, you will press the left Shift, left Control, and left Option keys simultaneously. However, some instructions suggest using the right Shift key, but this is less common.
4. Press and Hold Keys: Press and hold these three keys (Shift, Control, and Option) along with the power button. Hold all these keys for about 10 seconds. You might see the LED on the MagSafe adapter change or turn off temporarily.
5. Release Keys and Turn On: Release all the keys and the power button at the same time. Then, press the power button again to turn on your MacBook Pro.
6. Verify the Reset: Once your MacBook is back on, it should be functioning normally. If issues persist, you may need to consider other troubleshooting steps or contact Apple Support.
**Note: If your MacBook Pro has a T2 chip, you might also try an alternative method by pressing and holding the power button for 10 seconds after shutting down, then releasing it and pressing it again to turn on. However, the method involving the Shift, Control, and Option keys is more commonly recommended for resetting the SMC[4][5].
Resetting the SMC can resolve issues such as fan noise, keyboard backlight problems, and other system management-related issues[3][6].
Citations:[1] https://www.sweetwater.com/sweetcare/articles/reset-smc-mac/
[2] https://www.youtube.com/watch?v=IQnpi9kIHe4
[3] https://www.youtube.com/watch?v=WMAdyMkv-Lg
[4] https://discussions.apple.com/thread/254480685
[5] https://discussions.apple.com/thread/255145759
[6] https://techtoro.io/blog/how-to-reset-the-smc-on-macbook-step-by-step-guide/
[7] https://purplecomputing.com/tech-how-to/how-to-reset-the-smc-system-management-controller/
[8] https://support.apple.com/en-us/102605?displayMode=headless