If apple were to put their own custom-designed ARM chips in Macs, here is how it would happen:
1. Apple would design a 64 bit ARM processor.
2. That processor would first be used in Apple's data centers -- we wouldn't hear about it for years
3. Once Apple was satisfied with the processor, it would introduce it to outside customers at the high end. Perhaps Apple would make a "render farm in a box" and sell it to people who need a lot of CPU power for very...