How open a modal window and save chosen path to bookmarks on osx [objective c]

main.m

NSOpenPanel *openPanel = [[NSOpenPanel alloc] init];
[openPanel setCanChooseFiles:NO];
[openPanel setCanChooseDirectories:YES];
[openPanel setCanCreateDirectories:YES];

[openPanel beginWithCompletionHandler:^(NSInteger result) {
    if (result == NSModalResponseOK) {
        for (NSURL *fileURL in [openPanel URLs]) {
            NSString *filename = [fileURL path];
            [[NSUserDefaults standardUserDefaults] setObject:filename forKey:@"your_key_for_bookmark"];

            NSError *error = nil;
            NSData *bookmark = [fileURL bookmarkDataWithOptions:NSURLBookmarkCreationWithSecurityScope
                 includingResourceValuesForKeys:nil
                                  relativeToURL:nil
                                          error:&error];
            if (error) {
                NSLog(@"Error creating bookmark for URL (%@): %@", fileURL, error);
                [NSApp presentError:error];
            } else {
                [[NSUserDefaults standardUserDefaults] setObject:bookmark forKey:@"your_key_for_bookmark"];
                [[NSUserDefaults standardUserDefaults] synchronize];

                NSLog(@"Creating bookmark: %@", [NSString stringWithFormat:@"%@", bookmark]);
                NSError *error = nil;
                NSData *bookmark = [[NSUserDefaults standardUserDefaults] objectForKey:@"your_key_for_bookmark"];
                NSURL *bookmarkedURL = [
                                 NSURL URLByResolvingBookmarkData:bookmark
                                 options:NSURLBookmarkResolutionWithSecurityScope
                                 relativeToURL:nil
                                 bookmarkDataIsStale:nil
                                 error:&error
                                 ];
                BOOL ok = [bookmarkedURL startAccessingSecurityScopedResource];
                NSLog(@"Accessed ok: %d %@", ok, [bookmarkedURL relativePath]);
            }
            break;
        }
    }
}];