Implement the AXMakeProcessTrusted dance

[robrix]

1. Request authorization to escalate privileges
2. Escalate privileges
3. AXMakeProcessTrusted()
4. Relaunch

Relaunching should use some sort of callback mechanism or something so that client code can (for example) ask the user if they want to relaunch now or later (for those who care).

[numist]

If it's useful to you, the API can be enabled with:

// This code blocks, so get it to a background queue.
dispatch_async(dispatch_get_global_queue(0, 0), ^{
    // Programmatic enabling of support for assistive devices via https://github.com/mayoff/keyscope
    NSAppleScript *script = [[NSAppleScript alloc] initWithSource:@"tell app \"System Events\"\n\tset UI elements enabled to true\n\tget UI elements enabled\nend"];
    NSDictionary *error;
    NSAppleEventDescriptor *aed = [script executeAndReturnError:&error];

    if (!aed) {
        NSLog(@"Error enabling support for assistive devices: %@", error);
    } else if ([aed descriptorType] != 'true') {
        NSLog(@"Failed to enable support for assistive devices");
    } else {
        NSLog(@"Success!");
    }
});

It's not the same as blessing the process, but it'll unblock things and there's no need to relaunch the application—everything starts working immediately.