Let’s see if my new SDR works fine with FT8.
The operating system is macOS High Sierra (10.13.4).
I use Soundflower to send the audio stream from Gqrx to WSJT-X.
Now the settings for Gqrx. Remember that the Mode must be USB.
The Audio output should be either “Multi-Output Device” or “Soundflower (2ch)”.
Do not forget to enable Remote control (Tools -> Remote control).
Finally, the settings for WSJT-X.
“Hamlib NET rigctl” is selected as rig control.
Select “Soundflower (2ch)” for Soundcard Input.