Download and install PureFTPd_1.0.21.pkg.tgz. (Based on this build instructions)
Create a database in MySql called "pureftpd". (ftp.sql) (ftp.sql.tgz)
Download and move ftpAdmin (Rev. 6-11-05) folder to your web server directory.
Open ftpAdmin configuration file:
open -e /Library/WebServer/Documents/ftpAdmin/connection.inc.php
In the connection line edit username and password to your newly created database.
Open pureftpd-mysql.conf
open -e /usr/local/pureftpd/pureftpd-mysql.conf
Edit the following lines:
MYSQLUser username
MYSQLPassword password
MYSQLDatabase pureftpd
REBOOT COMPUTER
Point your browser to http://yourdomain.com/ftpAdmin to add and delete users.
To check via terminal who is active on your FTP:
/usr/local/pureftpd/sbin/pure-ftpwho -v