Keyboard, mouse or trackpad not working
When the keyboard or mouse stops working, it's usually batteries, a loose plug, or a setting that got switched off by accident.
Be careful: If a drink was spilled on the keyboard, turn the computer off and unplug it right away, and don't turn it back on. See our spilled drink answer.
What to do
Step 1: For a wireless mouse, keyboard or trackpad, charge it with its cable or change the batteries, and check its power switch is on.
Step 2: For a wired one, unplug it and plug it into a different port.
Step 3: Open the Apple menu, click System Settings, then Bluetooth, and check it's turned on and the device shows Connected.
Step 4: If it's not connected, turn the device off and on, then click Connect next to it.
Step 5: Restart the Mac. If you can't click, press and hold the power button until it turns off, wait, then turn it back on.
Step 6: Wipe the trackpad clean and dry, and take off any watch or ring touching it.
Still stuck? If a plug-in USB mouse or keyboard works but the built-in one doesn't, contact the computer maker's support or a trusted repair shop.