Apple pulls back the curtain on its secretive chip development operation

Apple pulls back the curtain on its secretive chip development operation To make it work, Apple operates a smattering of secret, unmarked laboratories around Silicon Valley. In some, custom Mac Minis stress test new chip designs to ferret out any weaknesses; others are de facto datacenters where next-generation chips are made available for software teams to test against.

If they're testing new chips on Mac Minis, I think it's safe to assume there's a version of OS X that runs on ARM? Am I right? Bueller? Anyone?