If the pointer doesn’t move when using the trackpad with Mac
If the pointer doesn’t move when you use the trackpad on your Mac laptop, make sure you’re using only one finger on the trackpad. Depending on the type of Mac laptop you have and the options you set in Trackpad settings, using more than one finger on the trackpad may not move the pointer.
To see the options, choose Apple menu 
in the sidebar. (You may need to scroll down.)
If there is an “Ignore accidental trackpad input” option in Trackpad settings and it’s turned on, using two fingers on the trackpad doesn’t move the pointer.
On some Mac laptops, you can use two fingers on the trackpad to scroll in windows that have scroll bars. If your Mac has this feature, you can’t use two or more fingers to move the pointer.
If the trackpad is still not working, your Mac may be showing a low battery alert that you can’t see. Connect your Mac to an electrical outlet or connect an external keyboard to see the alert.
If you still have difficulty, you may have a problem with your hardware. Contact Apple or an Apple Authorized Service Provider for service. Repairs performed by untrained individuals or using non-genuine Apple parts may affect the safety and functionality of the device.