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

*** 1065,1079 ****
          if (!focusAllowedFor()) {
              focusLog.fine("focus is not allowed");
              return false;
          }
  
!         // Cross-app activation requests are not allowed.
!         if (cause != CausedFocusEvent.Cause.MOUSE_EVENT &&
!             !((LWToolkit)Toolkit.getDefaultToolkit()).isApplicationActive())
!         {
!             focusLog.fine("the app is inactive, so the request is rejected");
              return false;
          }
  
          Window currentActive = KeyboardFocusManager.
              getCurrentKeyboardFocusManager().getActiveWindow();
--- 1065,1075 ----
          if (!focusAllowedFor()) {
              focusLog.fine("focus is not allowed");
              return false;
          }
  
!         if (platformWindow.rejectFocusRequest(cause)) {
              return false;
          }
  
          Window currentActive = KeyboardFocusManager.
              getCurrentKeyboardFocusManager().getActiveWindow();