// Create task
STPrivilegedTask *privilegedTask = [STPrivilegedTask new];
[privilegedTask setLaunchPath:@"/usr/bin/touch"];
[privilegedTask setArguments:@[@"/etc/my_test_file"]];

// Setting working directory is optional, defaults to /
// NSString *path = [[NSBundle mainBundle] resourcePath];
// [privilegedTask setCurrentDirectoryPath:path];

// Launch it, user is prompted for password (blocking)
OSStatus err = [privilegedTask launch];
if (err == errAuthorizationSuccess) {
    NSLog(@"Task successfully launched");
}
else if (err == errAuthorizationCanceled) {
    NSLog(@"User cancelled");
} 
else {
    NSLog(@"Something went wrong");
}

OSStatus err = [STPrivilegedTask launchedPrivilegedTaskWithLaunchPath:@"/bin/sh" 
                                                            arguments:@[@"/path/to/script.sh"]];

// ... Launch task

[privilegedTask waitUntilExit]; // This is blocking

// Read output file handle for data
NSData *outputData = [[privilegedTask outputFileHandle] readDataToEndOfFile];
NSString *outputString = [[NSString alloc] initWithData:outputData encoding:NSUTF8StringEncoding];

// ... Launch task

NSFileHandle *readHandle = [privilegedTask outputFileHandle];
[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(getOutputData:)
                                             name:NSFileHandleReadCompletionNotification
                                           object:readHandle];
[readHandle readInBackgroundAndNotify];

// ...

- (void)getOutputData:(NSNotification *)aNotification {
    // Get data from notification
    NSData *data = [[aNotification userInfo] objectForKey:NSFileHandleNotificationDataItem];
    
    // Make sure there's actual data
    if ([data length]) {
        // Do something with the data
        NSString *outputString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"%@", outputString);

        // Go read more data in the background
        [[aNotification object] readInBackgroundAndNotify];
    } else {
        // Do something else
    }
}

[[NSNotificationCenter defaultCenter] addObserver:self
                                         selector:@selector(privilegedTaskFinished:)
                                             name:STPrivilegedTaskDidTerminateNotification
                                           object:nil];

- (void)privilegedTaskFinished:(NSNotification *)aNotification {
    // Do something
}

privilegedTask.terminationHandler = ^(STPrivilegedTask *privilegedTask) {
    NSLog(@"Terminating task: %@", [privilegedTask description]);
};

// ... Create your own AuthorizationRef

[STPrivilegedTask launchedPrivilegedTaskWithLaunchPath:@"/bin/sh"
                                             arguments:@"/path/to/script"
                                      currentDirectory:@"/"
                                         authorization:authRef]

OSStatus err = [privilegedTask launch];
if (err == errAuthorizationFnNoLongerExists) {
    NSLog(@"AuthorizationExecuteWithPrivileges not available");
}

BOOL works = [STPrivilegedTask authorizationFunctionAvailable];