Beware: macOS Finder "Connect to Server" accepts FTPS URLs (FTP in a SSL/TLS tunnel) but actually connects via plain FTP!

Solution 1:

No! Beware: Even though you explicitly requested FTPS, Finder actually uses FTP !

  • That is quite a horrible user experience in regards to https://apple.com/privacy/
    • Without telling the user, Finder simply falls back to FTP!
  • I checked this via Wireshark: FTPS address input in Finder is actually handled as plain FTP without telling the user

Apple documentation / feedback

  • macOS 11 documentation on Network address formats and protocols on Mac just says:

From the Finder, you can connect to FTP servers only with read-only access. To copy files to an FTP server, use an FTP app.

  • So the documentation is correct. Promises nothing about FTPS nor mentions it anyhow.
  • But Finder accepts FTPS input and transforms it to FTP without any warning!
    • If you also dislike this:
      • File feedback at the given documentation page
      • Or better file an issue at https://feedbackassistant.apple.com
        • I filed to Apple and mirrored it at http://www.openradar.me/FB9224153