If the MacBook is frozen, press and hold the Power button for 10 seconds, then release it
Wait a few seconds
Press the Power button again to turn it back on
If you have a MacBook with Touch ID, press and hold the Touch ID button for 10 seconds, then release it
If the MacBook is unresponsive, press and hold Control + Command + Power button for 10 seconds, then release it
If the MacBook still does not restart, unplug all accessories and try again
If the battery is removable, shut it down, remove the battery, reinsert it, then turn it on
If the MacBook has a non-removable battery and is completely unresponsive, let the battery drain, then charge it and turn it on