Our 2.5 mm nut driver makes a rare appearance (you may remember its role in the Teardown do iPhone 6s)—removing logic board standoff screws. Thanks to our iPhone Marlin kit, we're covered!

Good to see incredibly-thin computers opting for screws over glues. Hey, iPad team, take note?

The fanless M1 MacBook Air-sized logic board is housed in the artificial "chin" of the iMac.

Unlike the one in the MacBook Air, this M1 is actively cooled by a pair of fans. Each fan blows inward across the logic board, where the heatsink draws heat away from the M1 with a copper heat pipe and two short heatsinks.

We'll circle back later for a closer look at those fans, but we can't resist a bare logic board!