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Recently it came to light that, it appears as though, Apple's Apple Silicon (M1* systems) macOS computers in China generally have the arm64e ABI enabled while users of such systems in the USA are still using, by default, the arm64 ABI.

Does anyone know why this is happening and/or what repercussions there could be from this differential?

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  • Apple provides info about it here: github.com/apple/llvm-project/blob/apple/main/clang/docs/… But it's pretty deep.
    – benwiggy
    Jun 11, 2022 at 7:39
  • Thanks for sharing that @benwiggy, however I'm not seeing any specific logic or indication as to why they're choosing to deploy this first in an Asian-China situation vs in other regions or in smaller test groups. It seems odd and I have yet to find logic that explains or alludes to their decision/thought process.
    – ylluminate
    Jun 11, 2022 at 15:44
  • why Apple does a thing is officially off topic here as only Apple knows why and they are not talking. We focus on solving a a particular issue and leaving the speculation to the pundits.
    – Steve Chambers
    Jun 11, 2022 at 20:27
  • Why is a pretty important thing to understand - especially HERE. This will, for example, help us to understand whether or not we should or should not do various things such as enabling the ABI and using the ABI now vs later. Is there an imminent release of a non-test since they're doing this? I could greatly extend this and I believe it is very relevant for anyone here.
    – ylluminate
    Jun 12, 2022 at 0:25

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