1 files changed, 6 insertions, 1 deletions
diff --git a/macosx/tkMacOSXDialog.c b/macosx/tkMacOSXDialog.c
index eebff3c..4ceb010 100644
--- a/macosx/tkMacOSXDialog.c
+++ b/macosx/tkMacOSXDialog.c
@@ -1013,7 +1013,8 @@ Tk_MessageBoxObjCmd(
     NSArray *buttons;
     NSAlert *alert = [NSAlert new];
     NSInteger modalReturnCode = 1;
-
+    BOOL parentIsKey = NO;
+    
     iconIndex = ICON_INFO;
     typeIndex = TYPE_OK;
     for (i = 1; i < objc; i += 2) {
@@ -1139,6 +1140,7 @@ Tk_MessageBoxObjCmd(
     callbackInfo->typeIndex = typeIndex;
     parent = TkMacOSXDrawableWindow(((TkWindow *) tkwin)->window);
     if (haveParentOption && parent && ![parent attachedSheet]) {
+	parentIsKey = [parent isKeyWindow];
 #if MAC_OS_X_VERSION_MIN_REQUIRED > 1090
  	[alert beginSheetModalForWindow:parent
 	       completionHandler:^(NSModalResponse returnCode)
@@ -1161,6 +1163,9 @@ Tk_MessageBoxObjCmd(
     result = (modalReturnCode >= NSAlertFirstButtonReturn) ? TCL_OK : TCL_ERROR;
  end:
     [alert release];
+    if (parentIsKey) {
+	[parent makeKeyWindow];
+    }
     return result;
 }