Our website provided a free download of JMRI/DecoderPro 4.14 for Mac. The software lies within Games, more precisely Tools. This free Mac application is a product of jmri.
From the developer:
DecoderPro is a tool for programming model railroad DCC decoders. It provides a simpler user interface, grouping together choices and using text instead of bits and bytes. It works with the most common DCC systems: Digitrax, EasyDCC, Lenz, NCE, SPROG, Wangrow and Zimo.
What's new in this version:
See http://jmri.sourceforge.net/releasenotes/jmri3.2.shtml.
You may want to check out more Mac applications, such as Reggie or JourneyMaker, which might be related to JMRI/DecoderPro.