Macintosh Client Cannot Connect to Serv-U - KB Article #1352Related Articles --
For anyone connecting to Serv-U using a Macintosh we recommend using Fetch. Fetch is considered the de-facto standard for Macintosh FTP clients.
When configuring Fetch, make sure the passive mode option is enabled.
NOTE: Starting with version 10.2 of the Mac OS, the Finder application no longer supports FTP. Mac users will need to use a third-party utility such as Fetch in order to use FTP.