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.
You should also make sure that apache is running. The following command should give you a number of processes named apache2
$ ps -A | grep apacheIf it is not running, you can start it with (path shown as it is on Debian)
$ (sudo) /etc/init.d/apache2 start
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.