How to display an OS alert that prompts permission to use location information

I am creating an app that runs on Mac using objective-c. Since location information permission is required, I implemented the following.

//  AppDelegate.m

#import <CoreLocation/CoreLocation.h>

- (void)getLocation {
	CLLocationManager *locationManager = [[CLLocationManager alloc] init];
	[locationManager requestWhenInUseAuthorization];
}

- (IBAction)buttonClicked:(id)sender{
	[self getLocation];
}

Info.plist

<key>NSLocationUsageDescription</key>
<string>This app requires location information.</string>

What I'm hoping for is that when I run this app and press the button, I'd like to see an OS alert asking for permission to use location information, saying "xxx" would like to use your current location.

However, when I try it, no alert is displayed. However, the app name has been added to the "Location Services" item in "Security & Privacy" in System Preferences.

How can I display alerts?