Have a look here https://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=475833#Post475833 try the Java GUI and see if it works for you on the Mac as the tool can be created with java as there is no AutoHotKey app for Mac that will also create a GUI, unless you know of one ?
You can also request PG create a similar tool for users on both Win & Mac.