I recently wrote an article on my 24-inch iMac when the Magic Keyboard with Touch ID quit working. I tried several steps to fix the issue:
- I quit and relaunched Pages (the app I was using when the problem started).
- I powered off, then powered back on the Magic Keyboard.
- I restarted my iMac.
- I powered off, then powered on, the all-in-one iMac.
- I disabled Bluetooth, then re-enabled it. To do so, follow these steps:
- From the Apple menu (), open System Preferences and choose Bluetooth.
- Click the option to “Turn Bluetooth Off” (if it’s already off, there’s your problem).
- Wait for a second and turn Bluetooth back on. Your Magic Keyboard and other Bluetooth devices should show up in the right side of the Bluetooth panel.
Still Not Working?
If your Magic Keyboard still isn’t working — and it wasn’t for me — connect your keyboard to your Mac with the Lightning to USB Cable or USB-C to Lightning Cable. Wait 1 minute, then disconnect the cable.
This pairs the accessory with your Mac and charges the built-in battery. To check your accessory’s charge level, click the Control Center icon in the menu bar, then click Bluetooth.
That worked for me. As I said, this was accomplished on a 24-inch iMac, but, hopefully, it will work for you, as well.