As promised, let’s dive back into that shiny new keyboard! Despite the update, it remains a tough nut to crack, but the trifecta of heavy-duty suction, isopropyl alcohol, and patience pays off.

The Touch ID key may look like an ordinary keycap on top, but the undercarriage looks very similar to an iPhone 7 Touch ID sensor.

That's not a total surprise: Touch ID sensors have been cryptographically paired to their original hardware for years. But these Touch ID peripherals are new, so we kept testing:

Two iMacs, one keyboard: once a keyboard is paired to an iMac, it must be unpaired in order to be paired to another iMac. Unpairing a keyboard invalidates the Touch ID profile stored on the iMac, even if it's re-paired to the same keyboard later on.