Hi faceoff i can't be leave you have same os. Lib Crash.
Your explanation is very confusion,so.

on new MacPro 6.1 have you tested SNOW LEOPARD 10.6.8????? and Cat 364????
i'm not sure it work properly on it.....
are you using dongle V4 or V5?????
Please attach one of your Cat settings and pdf profile,i'll check it.

ROBERTO NOVELLI