I’m trying to build a simple macOS command-line tool in Objective C that merely gets the current location via a CLLocationManager. However, none of my delegate’s methods are ever called and my MacBook never prompts me to grant the app location access.

Here’s the core of my code:

bool
getLocation(MyDelegate *delegate)
{
    CLLocationManager *manager;

    if ( ![CLLocationManager locationServicesEnabled] ) {
        NSLog(@"Location services are disabled");
        return false;
    }

    manager = [CLLocationManager new];
    [manager setDelegate:delegate];
    [manager setDesiredAccuracy:kCLLocationAccuracyBest];
    [manager requestAlwaysAuthorization];
    NSLog(@"Requesting location");
    [manager requestLocation];

    NSLog(@"Waiting for delegate to be ready");
    if ( ![delegate waitToBeReady:10] ) {
        NSLog(@"Timed out");
        return false;
    }

    return [delegate authorized];
}

MyDelegate.h:

typedef void (^Callback)(CLLocation *result, NSString *error);

@interface MyDelegate : NSObject <CLLocationManagerDelegate>
- (instancetype)initWithCallback:(Callback)callback;
- (bool)waitToBeReady:(unsigned int)timeout;
- (bool)authorized;
@end

MyDelegate.m:

@implementation MyDelegate {
    Callback _callback;
    dispatch_semaphore_t _ready;
    bool _authorized;
}

- (instancetype)initWithCallback:(Callback)callback
{
    self = [super init];
    if ( self ) {
        _callback = callback;
        _ready = dispatch_semaphore_create(0);
        _authorized = false;
    }
    return self;
}

- (bool)waitToBeReady:(unsigned int)timeout
{
    dispatch_time_t deadline;

    deadline = (timeout == 0)? DISPATCH_TIME_FOREVER : dispatch_time(DISPATCH_TIME_NOW, timeout * NSEC_PER_SEC);
    return dispatch_semaphore_wait(_ready, deadline) == 0;
}

- (bool)authorized
{
    return _authorized;
}

- (void)locationManagerDidChangeAuthorization:(CLLocationManager *)manager
{
    switch ( [manager authorizationStatus] ) {
    case kCLAuthorizationStatusNotDetermined:
        return;

    case kCLAuthorizationStatusRestricted:
    case kCLAuthorizationStatusDenied:
        NSLog(@"Location authorization denied");
        break;

    case kCLAuthorizationStatusAuthorizedAlways:
        NSLog(@"Location authorization granted");
        _authorized = true;
        break;
    }

    dispatch_semaphore_signal(_ready);
}

- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    _callback([locations lastObject], nil);
}

- (void)locationManager:(CLLocationManager *)manager didFailWithError:(NSError *error)
{
    _callback(nil, [error localizedDesciption]);
}

Info.plist:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>NSLocationAlwaysUsageDescription</key>
    <string>We need your location to provide better services.</string>
</dict>
</plist>

I see the log message, “Waiting for delegate to be ready”, but it just times out. As mentioned above, none of my delegate’s methods are ever called and I never get prompted to grant the tool access.