Every month or so, Manock and Oyama would present a new iteration based on Jobs's previous criticisms.
The latest plaster model would be dramatically unveiled,
and all the previous attempts would be lined up next to it.
That not only helped them gauge the design's evolution,
but it prevented Jobs from insisting that one of his suggestions had been ignored.
"By the fourth model, I could barely distinguish it from the third one," said Hertzfeld,
"but Steve was always critical and decisive, saying he loved or hated a detail that I could barely perceive."
One weekend Jobs went to Macy's in Palo Alto and again spent time studying appliances, especially the Cuisinart.
He came bounding into the Mac office that Monday, asked the design team to go buy one,
and made a raft of new suggestions based on its lines, curves, and bevels.
Jobs kept insisting that the machine should look friendly.
As a result, it evolved to resemble a human face.
With the disk drive built in below the screen,
the unit was taller and narrower than most computers, suggesting a head.
The recess near the base evoked a gentle chin,
and Jobs narrowed the strip of plastic at the top
so that it avoided the Neanderthal forehead that made the Lisa subtly unattractive.
The patent for the design of the Apple case was issued in the name of Steve Jobs as well as Manock and Oyama.
"Even though Steve didn't draw any of the lines,
his ideas and inspiration made the design what it is," Oyama later said.
"To be honest, we didn't know what it meant for a computer to be 'friendly' until Steve told us."