Looks like our Renderman licenses have expired, we won't be able to test this soon.
I remember that our procedural worked for Renderman 24 on all platforms.
I think PRMan 25 API is compatible with 24 (it was 24 that was a major change since 23), so the procedural for 24 should work in 25 too, but who knows, maybe I'm missing something.
Do you have the option to test on Windows too?
Ivan Kolev (Software Developer, EPHERE Inc.)
E-mail: ivan.kolev at ephere dot com
Discord: ikolev