Cross-compiling is likely a better approach: https://github.com/tpoechtrager/osxcross

This is how Godot targets iOS: https://github.com/godotengine/build-containers/blob/main/Do...

Here's a Docker image with the tools preinstalled, though you'll need some tweaks to target iOS: https://github.com/shepherdjerred/macos-cross-compiler

While at RStudio (now called Posit), I worked on cross-compiling C/C++/Fortran/Rust on a Linux host targeting x86_64/aarch64 macOS. If you download an R package with native code from Posit Package Manager (https://p3m.dev/client/), it was cross-compiled using this approach :)