--- tk8.6.12/macosx/tkMacOSXDialog.c	2021-10-29 17:08:23.000000000 +0000
+++ tk8.6.12-patched/macosx/tkMacOSXDialog.c	2021-11-02 19:04:59.000000000 +0000
@@ -379,6 +379,7 @@
 	    [NSApp tkFilePanelDidEnd:panel
 			  returnCode:modalReturnCode
 			 contextInfo:callbackInfo ];
+	    [parent endSheet:panel];
 	}
     } else {
 	modalReturnCode = [panel runModal];