FTP stands for the File Transfer Protocol. An FTP client is generally used to copy files from one machine to another over the Internet. Two computers involved in an FTP transfer are called a client and a server. The FTP server runs an FTP server software that listens to connection requests on the network from other computers. Client computers, that initiate connection to a server computer, usually have FTP client software installed. There is a variety of FTP client Mac programs available on the web, but how do you choose the best one?