Thanks for your repoly. HOWEVER:
OK but I DID say which version of the OS, it i called macOS (see my title). ccleaner version: 1.13.442 (latest) downloaded from pirform. Yes the mac version.
This kind of response involving a poor reading of the initial thread wastes time and effort.
Just to clarify if it was not obvious: this is a NEW version of the OS (in beta) and I assume ccleaner will eventually support macOS but currently it does not -- nothing surprising here. Maybe there is a workaround or maybe this message will alert the Pirform folks that their great product needs a tweak to support macOS.