I borrowed a PowerBook G4 with OSX 10.5.8. Then I searched for a CAT software, and the easier to install was flrig from the fldigi suite. I tried jLog but it complained that "radiocomm.jar are not properly installed" (no results on Google to help troubleshooting). And I could not compile grig either.
I attach seven screenshots of the pairing procedure and sample usage. firig was able to control my FT-817 through the serial port over bluetooth, I just had to use the proper configuration (see the 6th screenshot below).
Provided there is software for more recent MACs, the adapter should work on them too.
|Make sure to select the last option, "Any device"|
|flrig in use and the configuration screen|
|When you're done, disconnect the adapter|