diff -r d032e220869d glass/glass-mat-lib-macosx/src/com/sun/mat/ui/GlassViewDelegate.m
--- a/glass/glass-mat-lib-macosx/src/com/sun/mat/ui/GlassViewDelegate.m	Fri May 25 11:27:53 2012 -0700
+++ b/glass/glass-mat-lib-macosx/src/com/sun/mat/ui/GlassViewDelegate.m	Tue May 29 16:09:58 2012 -0400
@@ -832,7 +832,7 @@
     int yAbs = y + [self->nsView window].frame.origin.y + [self->nsView frame].origin.y;
     int mask;
     
-    NSDragOperation operation = [[info draggingSource] draggingSourceOperationMaskForLocal:NO];
+    NSDragOperation operation = [info draggingSourceOperationMask];
     jint recommendedActions = [GlassDragSource mapNsOperationToJavaMask:operation];
     [GlassDragSource setMask:recommendedActions];
     switch (type)