The process to reset SMC on a MacBook depends on which MacBook you own. If you own a MacBook with a T2 Security Chip, Shut Down > Press and hold the power button for 10 seconds and release it > wait for a few minutes and then restart your Mac. If you own a MacBook without a T2 Security Chip, Unplug and shut down your MacBook > Press and hold Shift + Option + Control keys on the left side along with the Power button for 10 seconds and release all of them together > Plug in your MacBook to power and turn it back on.