Tidak dapat mengatur virtual host di OS X

Saya mencoba membuat host virtual untuk pengembangan PHP, jadi saya tidak pergi ke http://localhost/new_website, tetapi untuk new_website.devdan mendapatkan situs web.

Saya telah membuat direktori di folder / Situs dan mengedit /etc/apache2/extra/httpd-vhosts.conffile dan /private/etc/hostsfile tersebut.

Konten file vhosts saya:

#
# Virtual Hosts
#
# If you want to maintain multiple domains/hostnames on your
# machine you can setup VirtualHost containers for them. Most configurations
# use only name-based virtual hosts so the server doesn't need to worry about
# IP addresses. This is indicated by the asterisks in the directives below.
#
# Please see the documentation at 
# <URL:http://httpd.apache.org/docs/2.2/vhosts/>
# for further details before you try to setup virtual hosts.
#
# You may use the command line option '-S' to verify your virtual host
# configuration.

#
# Use name-based virtual hosting.
#
NameVirtualHost *:80

#
# VirtualHost example:
# Almost any Apache directive may go into a VirtualHost container.
# The first VirtualHost section is used for all requests that do not
# match a ServerName or ServerAlias in any <VirtualHost> block.
#

<VirtualHost *:80>
    DocumentRoot "/Users/Rob/Sites"
    ServerName localhost
</VirtualHost>


<VirtualHost *:80>
    DocumentRoot "/Users/Rob/Sites/new_website"
    ServerName new_website.dev
</VirtualHost>

Dan konten file host saya:

##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting.  Do not change this entry.
##
127.0.0.1   localhost
255.255.255.255 broadcasthost
::1             localhost 
fe80::1%lo0 localhost

127.0.0.1 new_website.dev

Dan dari apa yang saya temukan di internet, ini seharusnya untuk trik, tetapi entah bagaimana, saya tidak mendapatkan index.php dari new_websitedirektori, tetapi saya mendapatkan index.php dari Sitesdirektori. Jadi root server bisa dikatakan. Apa yang saya lakukan salah?