仮想ホストが機能していないようです...自分が何をしているのかわからないと思います。
httpd.conf
NameVirtualHost *
<VirtualHost *>
ServerName localhost
DocumentRoot "/Applications/MAMP/bin/mamp"
<Directory "/Applications/MAMP/bin/mamp">
Options Indexes FollowSymLinks Includes execCGI
AllowOverride None
Order Allow,Deny
Allow From All
</Directory>
</VirtualHost>
# rev.dev
<VirtualHost *>
ServerName revcms.dev
DocumentRoot "/Users/manuel/Sites/Rev"
<Directory "/Users/manuel/Sites/Rev">
Options Indexes FollowSymLinks Includes execCGI
AllowOverride None
Order Allow,Deny
Allow From All
</Directory>
</VirtualHost>
など/ホスト
##
# Host Database
#
# localhost is used to configure the loopback interface
# when the system is booting. Do not change this entry.
##
255.255.255.255 broadcasthost
::1 localhost
fe80::1%lo0 localhost
127.0.0.1 rev.dev
http://rev.devは 127.0.0.1 と同じように動作します。