Configured on a Mac mini (Mid 2011) running El Capitan, 10.11.5.
Note: The output audio will default to the headphone jack at random. There is a USB audio codec - Mac audio bug (at least on OS 10.11.5).
On the Mac:
On the TS-590SG:
3. Make sure a dummy load is present on the antenna connector, power on the TS-590SG and set the power output to 5 watts.
4. Press the Menu key.
5. Use the “MULTI/CH” selector and go to number 68, “USB PORT BAUDRATE”.
6. Use the UP/DOWN buttons and select 57600.
7. Use the “MULTI/CH” selector and go to number 69, “AUDIO INPUT LINE SELECTION FOR DATA COMMUNICATIONS”.
8. Use the UP/DOWN buttons and select “USB”.
9. Use the “MULTI/CH” selector and go to number 70, “SOURCE OF SEND/PTT TRANSMISSION”.
10. Use the UP/DOWN buttons and select “REAR”.
11. Use the “MULTI/CH” selector and go to number 76, “VOX OPERATION WITH DATA INPUT”.
12. Use the UP/DOWN buttons and select “ON”.
13. Press the MENU key to save and exit.
14. Turn off the TS-590SG.
15. Connect the USB cable to the rear USB connector on the TS-590SG.
16. Turn on the TS-590SG.
Go back to the Mac:
17. Open System Preferences.
18. Click on Sound.
19. Click on the Input tab. You should see “USB Audio CODEC”. Select the device. You should see the bars move with sound input.
20. Click on the Sound Effects tab. Using the "Play sound effects through" drop down menu, DO NOT choose "USB Audio CODEC". Click on the Output tab. You should see “USB Audio CODEC”. Select the device.
21. Close System Preferences.
22. Download and install WSJT-X. IMPORTANT: READ ReadMe.txt contained in the image before install.
23. Once you've successfully installed WSJT-X following the instructions in ReadMe.txt, open the application.
24. If the dialog asking you to configure the radio does not appear, go to the finder.
25. Click on WJST-X and choose “Preferences”.
26. Go to the “Radio” tab.
27. From the “Rig” drop down menu, choose “Kenwood TS-590SG”.
28. Under Serial Port Parameters, select the Serial Port “/dev/cu.SLAB_USBtoUART”, Baud Rate 57600, 8 Data Bits, 1 Stop Bit, Hardware Handshake, Force Control Lines DTR HIGH.
29. PTT Method, select “CAT”. (Note: you can also use "VOX" if necessary)
30. Transmit Audio Source, select “Rear/Data”.
31. Mode, select “None”.
32. Split Operation, select “None”.
33. Click on “Test CAT”. If the settings are correct, the button will turn GREEN and “Test PTT” will no longer be grayed out.
34. Click on “Test PTT” The button will turn RED and the TS-590SG will transmit. Click on “Test PTT” to stop transmitting.
35. Click “OK” at the bottom right.
36. The frequency indicator should now show your rig’s frequency and there will be a red dot next to the frequency display.
37. Select a band from the wavelength drop down menu to the left of the frequency display and the red dot.
38. With your selection, the TS-590SG will go to the correct frequency for that band, and the dot will turn GREEN.
39. Adjust the volume control below the GREEN dot so the input level is about 40-50 db.
40. Read the instructions for WSJT-X and connect to your antenna.
Note: When the waterfall no longer advances and no further transmissions are noted in the main window indicates WSJT-X has crashed. Quit and restart the program.
Note: A Mac Mini will generate S3 RF noise regardless if you are connected to the USB port through a SignaLink, or through the DB-9 connector, depending on the band.