Most users had to deal with transferring large files using an FTP client.Check whether your FTP client supports side-by-side directory comparison mode.Fast file transfer is a must in each decent macOS FTP client.Make sure the client supports different types of protocols.Others support connection to third-party storage servers like Dropbox and Google Drive. Some of them can only transfer from local servers to online servers. Check which clients are connecting to certain types of servers.FTP client should also support the ability to pause file transfer and resume it when needed.Support for parallel downloading or queuing of the files.The best OS X FTP client has bookmarks and search tools for your files.Security should be on the top of the list when choosing an FTP client.Look for intuitive interfaces with drag and drop functionality.These are the features that you should take into consideration when looking for the best OSX FTP client. Most FTP clients have the same functionality and are quite similar, but sometimes you find a tiny feature in one of them that changes the whole idea of FTP and makes it more useful to you. Checklist - what to look for in the best FTP client for Mac?