hello, have You solved the puzzle? Installed?
Stockfish Engine Plus ChessX

I used to be able to download the Stockfish engine (versions 10 and 11) and add it to ChessX. Now I have downloaded Stockfish 15 but am not able to add it to ChessX. What am I missing?
I am using a MacPro
Thanks
From the ChessX manual:
A note for OS X Users: Try to open the Options Dialog even if you do not want to tweak the options. This is the easiest way to check if the engine is working. If you get an error message, try to start the engine from the terminal. If it's not running from the terminal, ChessX won't be able to use it either.
Regarding Stockfish: do not use the official stockfish distribution, the engines usually do not work even with the latest OS X computers. The error messsage usually contains something like “Illegal instruction: 4”. In this case, just fetch the source code and build stockfish yourself.
I used to be able to download the Stockfish engine (versions 10 and 11) and add it to ChessX. Now I have downloaded Stockfish 15 but am not able to add it to ChessX. What am I missing?
I am using a MacPro
Thanks