Downloading chrysalis-dx 1.0 for Mac from our website was free. The actual developer of this software for Mac is Reflective Layer. The program lies within Games, more precisely Family.
From the developer:
Be in charge of a single species and watch it grow and branch into various species as it evolves generation after generation. In Chrysalis-Dx you will control three important environmental variables. Available Food, Temperature and CO2 level. As you adjust these level during the course of the simulation, you will be controlling the path of evolution.
You may want to check out more software for Mac, such as Youda Legend - The Golden Bird of Paradise, MakingMrRight or LittleFingers Preschool, which might be similar to chrysalis-dx.