Q: What makes design different at Apple?
A: We struggle with the right words to describe the design process at Apple  but it is very much about designing and prototyping and making. When you separate those, I think the final result suffers. If something is going to be better, it is new, and if it’s new you are confronting problems and challenges you don’t have references for. To solve and address those requires a remarkable focus. There’s a sense of being inquisitive and optimistic, and you don’t see those in combination very often.

[…] When you make a 3D model, however crude, you bring form to a nebulous idea and everything changes — the entire process shifts. It galvanises and brings focus from a broad group of people. It’s a remarkable process.
— Ive J. (2012) Sir Jonathan Ive: The iMan cometh by Marc Prigg

Design is inherently connected with prototype and make.

There isn’t much to add.