cs-41 6.4 for Mac is free to download from our software library. Cs-41 for Mac is included in Productivity Tools. The actual developer of this Mac application is AD&A Multimedia.
From the developer:
cs-41 RPN Calculator is a professional calculator for Mac.
You may want to check out more software for Mac, such as CFAbsoluteTimeConverter, PinholeCalc or hp10BII, which might be similar to cs-41.