You need to install a webserver such as Apache on the host system.
(package apache2 on Debian/Ubuntu; usually available on OSX)
The general files will be put in /var/www. You have to make this directory
writable by the user by executing (as root)
cd /var/www chmod 775 . chgrp netdev .Assuming that the user running SuperCollider is member of the group netdev. You can check this by:
groups
To add yourself to the group, execute as root (with instead of "nescivi" your username):
adduser nescivi netdevYou may need to logout and log back in for this to take effect.
On OSX the default path for http files is: /Library/WebServer/Documents/. You may have to enable "Web Sharing" in the "Sharing" settings in the System Preferences.