https://techcrunch.com/2021/04/20/apple-brings-touch-id-to-the-magic-keyboard/

Apple has unveiled a new, colorful iMac today with an Apple-designed M1 chip. But that was just part of the story as the company used that opportunity to release new Mac accessories. In addition to a Magic Trackpad and a Magic Mouse with multiple color options, Apple is bringing Touch ID to desktop Macs with a new Magic Keyboard.

Touch ID on desktop works as expected. There’s a fingerprint sensor located at the top right of the keyboard. It replaces the ‘Eject’ key that you can find on existing Apple keyboards. It lets you unlock your computer, pay with Apple Pay, unlock a password manager and more.