Plugin works fine, but fails to attach to debugger

[rory]

Is this relevant?

How to debug auval?

Great, that helped me. One thing to add, since 10.11 the debugger will not be able to debug auvaltool: Message from debugger: cannot attach to process due to System Integrity Protection Program ended with exit code: -1 The solution is to copy auvaltool over to the /Applications folder (and possibly rename it, to avoid confusion).