Mac OS X
Because there are not many contributors who use Mac OS X, this platform is difficult to develop for, although many aspects of it remain the same as on Linux. Dependencies are low for simply checking out, but higher for compiling games. The API Libraries are pretty much the standard open source ones that you see in Linux. ENIGMA itself takes the form of DYLIB (Dynamic Library) for calling as a library (e.g. from LateralGM), or JAR for command line usage.
In order to compile on OS X you will need to download XCode from the "app store" or apple's website.
Java 7. The enigma plugin is currently incompatible with java 6 and below. Instructions Here
Note: If you get errors starting LateralGM, Java 7 may not add itself to $PATH in which case executing: ln -sF "/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home/bin/java" /usr/bin/java; will fix it.
In order to run your games you will need to enable apps from anywhere in Security & Privacy settings:
XCode ships most of ENIGMA's dependencies.
SFML instructions Here