You could have downloaded JDet 1.4.8 for Mac from our software library for free. This free Mac application is a product of CNB-CSIC. The program relates to Education Tools.
From the developer:
JDet is a multiplatform software for the interactive calculation and visualization of function-related conservation patterns in multiple sequence alignments and structures. It contains the set of tools and features developer considers critical for the daily work with this kind of data, and that previously were disseminated in different packages and web servers.
You may want to check out more Mac applications, such as sciatrope, Analytics to Earth or TreeView X, which might be similar to JDet.