Ookla - 110KB (Freeware)
Millions of people each day go to Speedtest.net and use Speedtest mobile apps to test their Internet connection speeds. Now, the most accurate and convenient way to test your Internet connection speed resides right in your MacOS menu bar!
Key Features include:
Speedtest by Ookla for Mac is a great way to quickly check your connection. The app is small, lightweight, and consumes hardly any system resources. It uses a simple interface that drops down from your MacOS menu bar; simply click ‘Go’ to receive ping, download and upload data. When the test is complete you can share the data via an integrated menu.