It looked something like an upside-down desk lamp, and that -- along with Pixar's iconic "Luxo Jr." short -- earned the iMac G4 the adorable nickname of iLamp, a nickname that's stuck to this day.

the entire board is smaller than the stock iMac G4’s hard drive. It still took plenty of cramming, with a multitude of adapters finagled and massaged to fit inside the original housing.

Sometimes this succeeded, as in the case of the iMac G4, but there were also notable failures, like the Power Mac G4 Cube. The last radical Mac design was arguably the 2013 Mac Pro, sometimes ...