ROOT INSTALLATION MAC OS

//////////////////////ALTERNATIVE METHOD AT THE END//////////////////////////


copy paste to .bash_profile
#Include Path For CERN ROOT
export ROOTSYS=/usr/local/root (DIRECTORY WHERE YOU PUT ROOT)
export PATH=$ROOTSYS/bin:$PATH
export LD_LIBRARY_PATH=$ROOTSYS/lib:$PYTHONDIR/lib:$LD_LIBRARY_PATH
export PYTHONPATH=$ROOTSYS/lib:$PYTHONPATH

DOWNLOAD XCODE
https://www.ics.uci.edu/~pattis/common/handouts/macmingweclipse/allexperimental/macxcodecommandlinetools.html
CHECK XCODEVERSION
https://trac.macports.org/wiki/XcodeVersionInfo#macOS10.13
DOWNLOAD XQUARTZ
https://www.xquartz.org/

1. DOWNLOAD CMAKE ;
https://cmake.org/download/
Alternatively you can download cmake through homebrew

1.1 TO INSTALL HOMEBREW
https://brew.sh/
copy paste on to terminal;
$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
then
$ brew install cmake

1.12 Add this line to your .bashrc file:
PATH="/Applications/CMake.app/Contents/bin":"$PATH"

1.13 Reload your .bashrc file:
source ~/.bashrc

Verify the latest cmake version is installed: cmake --version
DOWNLOAD ROOT
https://root.cern/content/release-61302 .

//////////////////////ALTERNATIVELY//////////////////////////
WATCH MY OTHER ROOT INSTALLATION VIDEO FOR ALTERNATIVE METHODS https://youtu.be/B7XaBajTDjg

1. INSTALL XCODE & COMMAND LINE TOOLS
2. INSTALL XQUARTZ
3. INSTALL HOMEBREWW
$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
4. IN TERMINAL do $ brew install root