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######## How to build scol on macOS #########

 * Install XCODE
 * Install CMAKE
 * Install brew / Git / svn
 * Install CG http://developer.download.nvidia.com/cg/Cg_3.1/Cg-3.1_April2012.dmg
 * Download scol sources: svn checkout https://svn.scolring.org/trunk
 
 * create a .bash_profile file with:
  export SCOL_DEPENDENCIES_PATH="/Users/openspace3d/Documents/svn-scol/dependenci$
  export PATH="/usr/local/bin":"/Applications/CMake.app/Contents/bin":"$PATH"
  export MACOSX_DEPLOYMENT_TARGET=10.11
  export SVN_EDITOR=nano
 
 * In a terminal window
 $ sudo xcode-select --install
Or 
 $ sudo xcode-select --reset

 * Build dependencies using sh scripts
 * Build IOS / OSX projects using Xcode