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

@@ -121,10 +121,12 @@
     {
         super(target, platformComponent);
         this.platformWindow = platformWindow;
         this.peerType = peerType;
 
+        targetFocusable = target.isFocusableWindow();
+
         Window owner = target.getOwner();
         LWWindowPeer ownerPeer = owner == null ? null :
              (LWWindowPeer) AWTAccessor.getComponentAccessor().getPeer(owner);
         PlatformWindow ownerDelegate = (ownerPeer != null) ? ownerPeer.getPlatformWindow() : null;