A kumac file extension is related to the Physics Analysis Workstation and used for its macro files.
KUMAC file extension - Physics Analysis Workstation macro
What is kumac file? How to open kumac files?
File type specification:
The kumac file extension is associated with the Physics Analysis Workstation (PAW), a software tool to assist physicists in the analysis and presentation of their data, developed by CERN.
The kumac file stores macro.