diff --git a/5.15.2/qtbase/src/plugins/platforms/cocoa/qcocoaaccessibility.mm b/5.15.2/qtbase/src/plugins/platforms/cocoa/qcocoaaccessibility.mm
index 106c226..df0a1bf 100644
--- a/5.15.2/qtbase/src/plugins/platforms/cocoa/qcocoaaccessibility.mm
+++ b/5.15.2/qtbase/src/plugins/platforms/cocoa/qcocoaaccessibility.mm
@@ -386,6 +386,8 @@ id getValueAttribute(QAccessibleInterface *interface)
     }
 
     if (interface->state().checkable) {
+    	if (interface->state().checkStateMixed)
+            return @(2);
         return interface->state().checked ? @(1) : @(0);
     }