Accessing calendars in Mac Objective-C program

Question

This bit of code is intended to print my default calendar in iCal on my Mac but instead returns (null). Do I need to change something in the code or settings to be able to access my calendars? I'm running this in Xcode 4.5.2.

#import <Foundation/Foundation.h>
#import <EventKit/EventKit.h>


int main(int argc, const char * argv[])
{

    EKEventStore *store = [[EKEventStore alloc] initWithAccessToEntityTypes:EKEntityMaskEvent];
    NSLog(@"%@",[store defaultCalendarForNewEvents].calendarIdentifier);
    return 0;
}

Answer 1

For me the above code returns the identifier of the default calendar correctly (on 10.8.2).

Is your application sandboxed? The result will be (null) if you don't allow calendar access while sandboxed:

I'm not sure if this is possible at all, but also check if there is a default calendar selected. (I have one selected, and could not set the selection to none in Calendar.app).