I’m trying to create a Rust program that will ask for accessibility permission on macOS.

If the permission is granted (through Settings -> Privacy & Security -> Accessibility), then it works and returns true from AXIsProcessTrustedWithOptions.

But if the permission is not allowed, instead of prompting to ask for the permission, the program crashes with a segfault.

It seems the settings dictionary is created incorrectly, but I’m not sure why.

I created it by following AXIsProcessTrustedWithOptions Apple’s docs and tested it on macOS 14.4.1 (Apple silicon).

use accessibility_sys::AXIsProcessTrustedWithOptions;
use core_foundation_sys::base::{CFRelease, TCFTypeRef};
use core_foundation_sys::dictionary::{CFDictionaryAddValue, CFDictionaryCreateMutable};
use core_foundation_sys::number::kCFBooleanTrue;
use std::ffi::CString;
use std::ptr;

fn main() {
    let mut is_allowed = false;
    unsafe {
        let options =
            CFDictionaryCreateMutable(ptr::null_mut(), 1, std::ptr::null(), std::ptr::null());
        let key = CString::new("AXTrustedCheckOptionPrompt").unwrap();
        let value = kCFBooleanTrue;
        CFDictionaryAddValue(options, key.as_ptr().as_void_ptr(), value.as_void_ptr());
        is_allowed = AXIsProcessTrustedWithOptions(options);
        CFRelease(options as *const _);
    }
    println!("Accessibility permission enabled: {}", is_allowed);
}