https://wccftech.com/touch-id-sensor-on-apples-new-magic-keyboard-will-work-with-any-macbook-that-has-a-built-in-touch-id-sensor/

Apple has confirmed in an official document that its new Magic Keyboard with Touch ID works with any MacBook that has a built-in Touch ID sensor.

Details regarding the new Magic Keyboard with Touch ID has been scarce. There was confusion whether or not the new keyboard is 100% compatible with the Mac and how the Touch ID sensor will work.