TransData lets you monitor upload/download data for your Mac

AppYogi Software has introduced TransData - Network Data Transfer Rate 1.0, a utility developed exclusively for macOS. It features a single-threaded algorithm to monitor the download and upload data speed of your personal computer network. 

The menu bar app records and displays total data used with the interface of your Mac. It sports a floating widget that shows up/down data transfer rates with a micro view, as well as macro view with graphed data.

TransData requires macOS 10.10 or later and costs US$4.99 until Jan. 1, 2017, when the price will rise to $9.99. It’s available at the Mac App Store.