Transmit is the undisputed king of file transfer applications on the Mac. It's been around for 20 years, and if you need to send files to servers, there's nothing better. I was frankly surprised yesterday when they released Transmit 5. It seems like just yesterday I was buying Transmit 4 but it turns out that was actually seven years ago.
While I don’t use Transmit every day, when I do need to perform a file transfer operation from my Mac, there's nothing better. This is an excellent tool to have in your belt. They have a discount on the new version (from $45-$35) but it's only good for a week. If you ever need to perform file transfers, get in on the discount now. I already did.