I have CMake installed but it says this. I have ZERO knowledge about this. Please kindly help.

[rjustinragasa]

/Users/NAME/horos/CharLS

• cmake_dir=/Users/NAME/Library/Developer/Xcode/DerivedData/Horos-ghnyfmrrruazzobktxfbrunsieey/Build/Intermediates.noindex/Horos.build/Debug/CharLS.build/CMake
• install_dir=/Users/NAME/Library/Developer/Xcode/DerivedData/Horos-ghnyfmrrruazzobktxfbrunsieey/Build/Intermediates.noindex/Horos.build/Debug/CharLS.build/Install
• mkdir -p /Users/NAME/Library/Developer/Xcode/DerivedData/Horos-ghnyfmrrruazzobktxfbrunsieey/Build/Intermediates.noindex/Horos.build/Debug/CharLS.build/CMake
• cd /Users/NAME/Library/Developer/Xcode/DerivedData/Horos-ghnyfmrrruazzobktxfbrunsieey/Build/Intermediates.noindex/Horos.build/Debug/CharLS.build/CMake
• '[' -e Makefile -a -f .cmakehash ']'
• command -v cmake
• echo 'error: building CharLS requires CMake. Please install CMake. Aborting.'
  error: building CharLS requires CMake. Please install CMake. Aborting.
• exit 1

[TheDagger]

You have to make sure CMake is in your $PATH variable so it can find it. When you install the CMake GUI it has an option for installing command line tools in the menu and it will give you a text prompt saying what to enter in terminal, do the one that has the -install flag, should fix it.