Apple Filling Protocol (AFP) is a proprietary network protocol by Apple Inc. that provides file services for macOS, including older versions. AFP is employed for networked file access and sharing on Macintosh PCs, enabling users to access directories and shared files.

Moreover, AFP provides user authentication, permissions control, and file-locking mechanisms. It is a component of Apple’s network communication protocols package. Apple has adopted the Server Message Block (SMB) protocol in the most recent macOS versions to improve compatibility and support for current networking tools.

History of Apple Filling Protocol