> I see, so I wonder if there’s an x86_64-darwin27 - or whether the tools will > just allow building x86_64-darwin25 (and running that)
There is. On macOS 27 beta with matching beta compiler: $ clang -arch x86_64 a.c -v Apple clang version 21.0.0 (clang-2100.3.20.102) Target: x86_64-apple-darwin27.0.0 FX
