Untitled

    NSSavePanel *savePanel = [NSSavePanel savePanel];
    [savePanel setTitle:@"Save Playlist"];
    [savePanel setNameFieldStringValue:@"My Playlist"];
    [savePanel setAccessoryView:saveFileFormat];
    [savePanel setAllowedFileTypes:[NSArray arrayWithObjects:@"foo", @"bar", nil]];
    [savePanel setAllowsOtherFileTypes:NO];
    [savePanel setCanSelectHiddenExtension:YES];

    [savePanel runModal];