Since the iOS simulator is an x86 target it might not need any work. Adding a compiler target for ARM OS X may just be a matter of allowing the configuration.

Since the iOS simulator is an x86 target it might not need any work. Adding a compiler target for ARM OS X may just be a matter of allowing the configuration. Also, given the Intel OS X project was cooking long before they announced the transition, it’s likely safe to believe that full blown OS X on ARM is already running somewhere in a lab at Apple.