[nickpinkston]

The fun hardware aspects of this are how they choose to form curves for the aluminum MacBooks using cold forging to get create the broad curves of the device and then post-machining the keyboard, chamfered (angled) edges, and form tapping the screw boss threads - ie pressing not cutting the threads into the material.

Variable radii curves take forever to machine and must be polished, so that's only done on the cold forging die (and takes forever to do), so the die can then impart the geometry on the aluminum blank in only seconds in the forging press.

This is also how high-end aluminum car wheels are made with all their complex curvature.

Funny enough, they don't cover the forging in this video that describes most of the rest of the process, so I think Apple must've not wanted to talk about it, as least back then.

https://www.youtube.com/watch?v=sxbiIpXZfG8