Bug 257723 [Mac] Menu items "About Eclipse SDk" and "Preferences" of Top menu "Eclipse" not disable after show the dialog of "About Eclipse SDK"
bundles/org.eclipse.ui.cocoa/src/org/eclipse/ui/internal/cocoa/CocoaUIEnhancer.java
}});
	}
    /**
	 * Modify the given workbench window shell bits to show the toolbar toggle
	 * button.
	 * 
	 * @param window
	 *            the window to modify
	 * @since 3.2
	 */
	protected void modifyWindowShell(IWorkbenchWindow window) {
		
		
		
		
		boolean coolBarInitiallyVsible = ((WorkbenchWindow) window)
				.getCoolBarVisible();
		boolean perspectiveBarInitiallyVsible = ((WorkbenchWindow) window)
				.getPerspectiveBarVisible();
		if (coolBarInitiallyVsible || perspectiveBarInitiallyVsible) {
			
			
			
			NSToolbar dummyBar = new NSToolbar();
			dummyBar.alloc();
			dummyBar.initWithIdentifier(NSString.stringWith("SWTToolbar")); 
			dummyBar.setVisible(false);
			
			Shell shell = window.getShell();
			NSWindow nsWindow = shell.view.window();