zPerf

zPerf is a bandwidth performance measurement app for OS X. The app can operate as a client and/or server.

The program can be used for OS X-to-OS X testing or iOS-to-OS X testing using WiFiPerf app for iOS. zPerf should work with other operating systems that support iPerf3 but has only been tested with WiFiPerf app.
The program only supports TCP testing at this time.