Transmit 5 is an excellent FTP (file transfer protocol), SFTP, S3 (Amazon.com file hosting) and iDisk/WebDAV client that allows you to upload, download, and delete files over the internet. With the most Mac-like interface available, Transmit makes FTP as simple, fun, and easy as it can possibly be.

Viper FTP is a handy and powerful file manager for macOS, with a tremendous user interface that makes it effortless to use. Quickly access your remote servers to manage and transfer your files. The new user interface was redesigned to be cool, clean and functional.

FileZilla is a straightforward macOS application that enables you to quickly and effortlessly transfer files between your Mac and multiple FTP servers.

Update your web site as often as you like exactly as if you were copying files between folders on your computer!

In order to maintain your Web site you surely need some kind of FTP software however not all the FTP tools available today seem to be designed with frequent uploading in mind. Indeed, they are not always as handy as they could or should be. Actually, they all seem to copy each others. Updating files on your server can be a repetitive and boring process, and in many cases it's more trouble than it's worth. It doesn't have to be that way, however, as FTP Disk makes this whole process much more intuitive.

It's a simple ftp server software for uploading files to your Mac, or share files to others.

CrossFTP is an FTP, Amazon S3, Amazon Glacier and Google Storage client.

Mountain Duck, based on the solid open-source foundation of Cyberduck, allows you to mount remote volumes in Finder on macOS and File Explorer on Windows. Access remote files as if they were on a local disk, and edit them with your preferred applications. A minimalist user interface in the menu bar allows you to quickly mount remote volumes. Bookmarks are shared with Cyberduck if installed.

Fetch is a reliable, full-featured file transfer client for the Apple Macintosh whose user interface emphasizes simplicity and ease of use. Fetch supports FTP and SFTP, the most popular file transfer protocols on the Internet for compatibility with thousands of Internet service providers, web hosting companies, publishers, pre-press companies, and more.

Cyberduck is an FTP, SFTP, WebDAV, Amazon S3, OpenStack Swift, Backblaze B2, Microsoft Azure & OneDrive, Google Drive and Dropbox browser to transfer files to your web hosting service provider and connecting to cloud storage accounts from Rackspace Cloud Files, Google Storage and Amazon S3 with the same easy to use interface with quickly accessible bookmarks. The browser allows to download, upload and move or copy files using drag and drop with an hierarchical view to browse large folder structures efficiently. Transfers are handled with ease including synchronisation of local with remote directories. To edit files, a seamless integration with any external editor application makes it easy to change content quickly. Both Amazon CloudFront and Akamai content delivery networks (CDN) can be easily configured to distribute your files worldwide from edge locations.

Yummy FTP is an FTP + SFTP + FTPS file transfer client which focuses on speed, reliability and productivity.

Whether you need to transfer a few files or a few thousand, schedule automatic backups, or perform website maintenance, Yummy FTP will handle it with ease.

Yummy FTP Watcher automates uploads, downloads and syncs between your Mac and any number of FTP/S + SFTP + WebDAV/S servers, watching chosen folders for changes and acting upon them. Working tirelessly in the background, no fuss, always ready, waiting, watching....

Interarchy is an advanced file transfer app that supports FTP, SFTP, Webdav, S3 and the new, very fast iFTP. It also supports plug-in architecture for compressing files, running scripts and restarting servers.
It ties in well with both Amazon and Rackspace's cloud file hosting services, allowing you to transfer and manage data in the cloud. It also boasts as being the fastest file transfer client on the Mac, transferring over 80MB/sec on a gigabit network.

FavoriteFTP is a product to help you synchronize files between Mac and FTP servers. Do you still need to manually upload files you just edited? Do you still need to pickup files in different directories in order to upload them? Do you still need to check every directories in FTP server to download files your partners just updated? Please, leave it to FavoriteFTP. It detects new and changed files on Mac and FTP server, then synchronizes them automatically. All you need to do is a button click.

Mountain Duck, based on the solid open-source foundation of Cyberduck, allows you to mount remote volumes in Finder on OS X and File Explorer on Windows. Access remote files as if they were on a local disk, and edit them with your preferred applications. A minimalist user interface in the menu bar allows you to quickly mount remote volumes. Bookmarks are shared with Cyberduck if installed.

Yummy FTP Watcher automates uploads and downloads, and syncs between your Mac and any number of FTP/S + SFTP + WebDAV/S servers, watching the chosen folders for changes and acting upon them. Powered by the file transfer engine of the highly regarded Yummy FTP Pro app, all the speed and reliability you'd expect is provided, as well as useful features such as filtering, bandwidth limiting and Growl notifications.