diff --git a/src/lib/platform/OSXDragView.m b/src/lib/platform/OSXDragView.m
index 24c0f409..e1873b4a 100644
--- a/src/lib/platform/OSXDragView.m
+++ b/src/lib/platform/OSXDragView.m
@@ -103,7 +103,7 @@ draggingDestinationWindow
 - (NSDragOperation)
 draggingSourceOperationMask
 {
-	return NSDragOperationNone;
+	return NSDragOperationCopy;
 }
 
 - (NSPoint)draggingLocation
@@ -144,7 +144,7 @@ draggingSourceOperationMask
 
 - (NSDragOperation)draggingSession:(NSDraggingSession *)session sourceOperationMaskForDraggingContext:(NSDraggingContext)context
 {
-	return NSDragOperationNone;
+	return NSDragOperationCopy;
 }
 
 - (void)enumerateDraggingItemsWithOptions:(NSDraggingItemEnumerationOptions)enumOpts forView:(NSView *)view classes:(NSArray *)classArray searchOptions:(NSDictionary *)searchOptions usingBlock:(void (^)(NSDraggingItem *draggingItem, NSInteger idx, BOOL *stop))block