The ka2ddo web page for YAAC suggests that it will only run on x86 based OS X. Is this due to the situation concerning a JRE, or is there some other issue holding it back ?
I currently have a Mac mini M1 with a TAPRN 9600 TNC plugged into a USB port. While I don't have a proper APRS client on it. I can run screen and capture all the radio traffic as it is being seen. So that data path from the radio to the TNC to the Mac mini is all functional. I'm currently downloading an Azul ARM64 JRE to see how useful that might be.
73