Start an Apache WebServer in Mac

cd /etc/apache2/users/username.conf

change files content like below

Options Indexes Multiviews

AllowOverride AuthConfig Limit

Order allow,deny

Allow from all

start the web server on you mac

sudo apachectl start

/*other command

sudo apachectl stop

sudo apachectl restart

*/

the resources path is in 

/Library/WebServer/Documents/

any question contact me , i will help you asap