There are 2 ways to install FTP services on Mac 10.7:Option 1 (manual method): Enable the ftp server using the command line interface. Run Terminal ("Terminal" application in the Applications/Utilties folder) and enter the following command:
sudo -s launchctl load -w /System/Library/LaunchDaemons/ftp.plist
https://discussions.apple.com/thread/3213004?start=0&tstart=0Option 2 (automated method): http://www.macupdate.com/app/mac/39870/lion-ftpd-enabler