在apache2本地mac上设置多个虚拟主机

我正试图在本地apache2服务器上设置多个虚拟主机。我的目标是能够在浏览器中为我的Zend项目转到"zf2tutorial.localhost"，然后为我的symfony项目转到"symfonylocalhost"。现在，无论我是转到"zf2 tutorial.localhost"还是"symfony.local"，我的Zend项目都会得到服务

<VirtualHost *:80>
    ServerName zf2-tutorial.localhost
    DocumentRoot /Users/myusername/Sites/Zend/public
    SetEnv APPLICATION_ENV "development"
    <Directory /Users/myusername/Sites/Zend/public>
        DirectoryIndex index.php
        AllowOverride All
        Order allow,deny
        Allow from all
        Options Indexes FollowSymLinks
    </Directory>
</VirtualHost>
<VirtualHost *:80>
    ServerName symfony.localhost
    DocumentRoot /Users/myusername/Sites/symfony
    SetEnv APPLICATION_ENV "development"
    ServerAlias www.symfony.localhost
</VirtualHost>

我的"主机"文件以这两行结尾

127.0.0.1 zf2-tutorial.localhost localhost
127.0.0.1 symfony.localhost localhost

我做错了什么？