Xcode Command Line Tools (CLT). To install CLT on your machine, open a terminal and run:
If you do not have CLT installed, you will be presented with a dialog box allowing you to install CLT.
Additionally, for OSX Mojave (10.14), you also need to install the header package:
Download and install XQuartz
Install one of our redistributable packages pertaining to your OS X version:
Mojave 10.14: moose-environment_osx-mojave_20181203_x86_64.pkg
High Sierra 10.13: moose-environment_osx-highsierra_20181203_x86_64.pkg
Sierra 10.12: moose-environment_osx-sierra_20181203_x86_64.pkg