c-41 5.1 for Mac was free to download from our application library. The program lies within Education Tools, more precisely Science. This Mac app was originally produced by AD&A Multimedia.
From the developer:
c-41 is a programmable RPN calculator based on HP 41CV and the Card Reader.
You may want to check out more software for Mac, such as Video Editor Robot Lite, which might be related to c-41.