I am on an M3 Pro, MacOS 14.2. When I try `echo $MACHTYPE` (in a default `-zsh` shell) the output is `x86_64`, whereas [uname][1] `-mp` returns `arm64 arm`. [Zsh docs][2] say that `MACHTYPE` should be "the machine type (microprocessor class or machine model), as determined at compile time." Why is my compile time machine type set to `x86_64`? I am not running Terminal with Rosetta. Perhaps a more robust question, what is the intended usage of the `MACHTYPE` shell parameter on ARM-based MacOS?


  [1]: https://man7.org/linux/man-pages/man1/uname.1.html
  [2]: https://zsh.sourceforge.io/Doc/Release/Parameters.html#Parameters-Set-By-The-Shell