Hold your horses…I am making some progress with Fldigi…
I installed it through MacPorts and…IT WORKS! 
Installing through it gets current versions of the needed libraries (fltk, hamlib, libpng, libsamplerate, libsndfile, portaudio) and that did the trick. I guess W1HKJ will update the linked libraries in the released binaries.
So, where do we stand:
- Fldigi is booting (
- CAT control is driving me insane…right now I have a PL2303 CAT serial/USB cable and I can’t get it to communicate with the rig (unsigned drivers,…). I will look into this…
- sound interface (SignaLink) is working. I expected this, since it’s a driverless external sound device.
- Fldigi: everything crashed, so “IT WORKS” has to be interpreted as: it boots, it doesn’t crash, waterfall is showing. I didn’t do any QSOs and didn’t test QSO transfer to RUMlogNG.
So, the next issue I need to deal with is CAT. PL2303 might be a dead end, so I might change the chipset to FTDI. I guess I will know more in 1-2 weeks and hopefully also have the first QSOs.
As for WSJTX…at least I received some signals. With no CAT, I didn’t test sending and a full QSO…
Yes, this is a M1 Mac and BigSur:
