src/java.desktop/macosx/classes/sun/lwawt/macosx/CDropTargetContextPeer.java

*** 164,173 ****
--- 164,181 ----
          // On MacOS X all the DnD events should be synchronous
          return super.postDropTargetEvent(component, x, y, dropAction, actions, formats, nativeCtxt,
                  eventID, SunDropTargetContextPeer.DISPATCH_SYNC);
      }
  
+     @Override
+     protected void handleDropMessage(Component component, int x, int y,
+                                      int dropAction, int actions, long[] formats,
+                                      long nativeCtxt) {
+         super.handleDropMessage(component, x, y, dropAction, actions, formats, nativeCtxt);
+         flushEvents(component);
+     }
+ 
      // Signal drop complete:
      protected void doDropDone(boolean success, int dropAction, boolean isLocal) {
          long nativeDropTarget = this.getNativeDragContext();
  
          dropDone(nativeDropTarget, fNativeDropTransfer, isLocal, success, dropAction);