http://deployfx.com/2011/06/setting-up-apache-on-snow-leopard-easy/

hosts

##
# 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
 
# my development sites
127.0.0.1 app1.local

httpd.conf

# Include at the bottom of this file
Include /usr/local/etc/sites/*.conf

httpd.vhost.conf

# we will be listening on port 80 already so no need to tell apache to listen on port 80
# otherwise, we would specify it using the listen parameter
#Listen 80
 
# we will be using several different named addresses pointing to this ip
# so we need to let apache know about that
NameVirtualHost 127.0.0.1
 
# by default apache is super restrictive, so you need to allow access to the directories
# before apache will server things up.  if not, you'll get a permission denied error
<Directory /Users/USERNAME/Code>
    Options FollowSymLinks
    AllowOverride None
    Order allow,deny
    Allow from all
</Directory>
 
# the virtual host ip address must match exactly to the NameVirtualHost specific above
<VirtualHost 127.0.0.1>
	# files will be served from this location
	DocumentRoot /Users/USERNAME/Code
 
	# the requested server name was app1.local
	ServerName app1.local
</VirtualHost>