FPDistributedNotificationCenter

@interface FPDistributedNotificationCenter : NSObject
@end

@implementation FPDistributedNotificationCenter
- (id)init {
    if(self = [super init]) {
        [NSDistributedNotificationCenter.defaultCenter addObserver:self selector:@selector(receivedDistributedNotification:) name:nil object:nil];
    }
    return self;
}
- (void)dealloc {
    [NSDistributedNotificationCenter.defaultCenter removeObserver:self];
}
- (void)receivedDistributedNotification:(NSNotification *)notification {
    NSLog(@"%@\n%@\n%@", notification.name, notification.object, notification.userInfo);
}
@end

https://lists.apple.com/archives/cocoa-dev/2011/Nov/msg00158.html