Homebrew

Homebrew is a package manager that allows you to install software. To install Homebrew, follow these Terminal command line instructions:

install homebrew

/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

install XCode Command Line Tools

xcode-select --install

Agree if asked to install XCode Command Line Tools.

check homebrew

brew doctor

brew graphviz (optional)

brew install graphviz

brew ant

brew install ant

tap science

brew tap homebrew/science

install opencv

source

if you are not comfortable with vim export HOMEBREW_EDITOR=nano

brew edit opencv

within editor change: -DBUILD_opencv_java=OFF to -DBUILD_opencv_java=ON

if you have tried and failed to brew opencv before brew remove opencv

brew install --build-from-source opencv