问为什么Symfony4注解在我的mac上不能工作？

EN

<?php
    namespace App\Controller;

    use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
    use Sensio\Bundle\FrameworkExtraBundle\Configuration\Method;
    use Symfony\Component\HttpFoundation\Response;

class ArticleController
{
    /**
     * @Route("/")
     */
    public function indexAction()
    {
       return new Response('OMG! My first page already! Wooooo!');
    }

    /**
    * @Route("/{id}", requirements={"id" = "\d+"}, defaults={"id" = 1})
    */
    public function showAction($id)
    {
        echo 123;die;
    }

    /**
    * @Route("/news/{$slug}")
    * @Method({"GET", "POST"})
    */
    public function news($slug)
    {
        return new Response(sprintf('Today new is "%s"', $slug));
    }
}