This FPT client is very simple, once open, it will ask us to configure the server (or servers) that we want to connect to, after this it will open a Window where it will only show the files that are on the server, leaving out the ones that we have on our computer like other FTP clients do. And to upload or download any file all we will have to do is select it and add it to the queue or drag and drop it. As easy as that.
It also has a task queue, that we will be able to add any task to (upload or download files) so that they are launched one after the other when we tell it to do so with the huge "Play" button.
So now you know, if you need an FTP client for Mac OS X that is simple yet effective, and best of all free, OneButton FTP is an option that is really worth considering.