I am in the same boat. If you figured it out let me know. I have an IC 703 and an FT 847. The main problem is I cannot seem to get the plug and play to hear the tones. I know audio is coming out as I hear them in the speaker but the PTT does not kick over in the P&P or the rig.
I know the unit works as I have an old 300MHz laptop I use it with for digipan. Thought I would upgrade and stop slumming it with Windows
so got FLDIGI for Mac.
Again, if you figured it out I'd love to hear it.