Object not found!

hey guys ihv this problem my friend in work give me this project in GitHub but i downloaded this file in my mac but dont work 
i importer databases and anything good and htaccess its worked but when itry this link (http: //localhost/online.grandoriatours.com/)
Automatically give me this link (http: //localhost/install/) and this msg 
please anyone help me for fix this probleme


Object not found!
The requested URL was not found on this server. If you entered the URL manually please check your spelling and try again.
If you think this is a server error, please contact the webmaster.
Error 404
localhost