- iOS 2.0–9.0Deprecated
- macOS 10.3–10.11Deprecated
- Mac Catalyst 13.0–13.0Deprecated
- tvOS 9.0–9.0Deprecated
FTP Proxy Port stream property key or FTP Proxy dictionary key for set and copy operations. The value of this property is a CFString containing the password to be used when connecting to the proxy server.