--- old/src/macosx/classes/sun/lwawt/macosx/CDragSourceContextPeer.java	2013-07-11 13:02:53.000000000 +0400
+++ new/src/macosx/classes/sun/lwawt/macosx/CDragSourceContextPeer.java	2013-07-11 13:02:53.000000000 +0400
@@ -110,6 +110,7 @@
         //It sure will be LWComponentPeer instance as rootComponent is a Window
         PlatformWindow platformWindow = ((LWComponentPeer)rootComponent.getPeer()).getPlatformWindow();
         long nativeViewPtr = CPlatformWindow.getNativeViewPtr(platformWindow);
+        if (nativeViewPtr == 0L) return; // Unsupported
 
         // If there isn't any drag image make one of default appearance:
         if (fDragImage == null)
--- old/src/macosx/classes/sun/lwawt/macosx/CDropTarget.java	2013-07-11 13:02:54.000000000 +0400
+++ new/src/macosx/classes/sun/lwawt/macosx/CDropTarget.java	2013-07-11 13:02:54.000000000 +0400
@@ -52,6 +52,8 @@
         fPeer = peer;
 
         long nativePeer = CPlatformWindow.getNativeViewPtr(((LWComponentPeer) peer).getPlatformWindow());
+        if (nativePeer == 0L) return; // Unsupported
+
         // Create native dragging destination:
         fNativeDropTarget = this.createNativeDropTarget(dropTarget, component, peer, nativePeer);
         if (fNativeDropTarget == 0) {
--- old/src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java	2013-07-11 13:02:55.000000000 +0400
+++ new/src/macosx/classes/sun/lwawt/macosx/CPlatformWindow.java	2013-07-11 13:02:55.000000000 +0400
@@ -900,8 +900,6 @@
             nativePeer = ((CPlatformWindow) platformWindow).getContentView().getAWTView();
         } else if (platformWindow instanceof CViewPlatformEmbeddedFrame){
             nativePeer = ((CViewPlatformEmbeddedFrame) platformWindow).getNSViewPtr();
-        } else {
-            throw new IllegalArgumentException("Unsupported platformWindow implementation");
         }
         return nativePeer;
     }