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?