The state of Rust MacOS bindings is pretty bad. Last I checked, a lot of crates are built on top of the `core-foundation` crate which is full of unsound abstrac

The state of Rust MacOS bindings is pretty bad. Last I checked, a lot of crates are built on top of the `core-foundation` crate which is full of unsound abstractions. And a lot of them seem to be hard to fix, as the Core Foundation types are all equivalent to `Arc<Data>` with no synchronization of the inner data. This makes mutable collections very complicated to model, for instance.