Install OpenCV 3 with Python 2.7

install-opencv.sh

# Install Xcode
# Before we can even think about compiling OpenCV, we first need to install Xcode, 
# a full blown set of software development tools for the Mac Operating System.


# Accept the Apple Developer license
sudo xcodebuild -license

# Install Apple Command Line Tools
sudo xcode-select --install

# Install Homebrew
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
brew update
nano ~/.bash_profile
# And insert the following lines at the bottom of the file 
# export PATH=/usr/local/bin:$PATH
source ~/.bash_profile

# Installing Python via Homebrew
# In general, you do not want to develop against the system Python as your main interpreter
# Install python from an office installer provided by Python.org https://www.python.org/downloads/
which python
# Important: Be sure to inspect the output of the which  command! 
# If you see /Library/Frameworks/Python.framework/Versions/2.7/bin/python  then you are correctly using the Hombrew version of Python.

# Install NumPy
pip install numpy

# Install OpenCV prerequisites using Homebrew
brew install cmake pkg-config
brew install jpeg libpng libtiff openexr
brew install eigen tbb

# Download the OpenCV 3 source from GitHub
cd ~
git clone https://github.com/opencv/opencv
git clone https://github.com/opencv/opencv_contrib

# Configuring OpenCV 3 and Python 2.7 via CMake on macOS
cd ~/opencv
mkdir build
cd build

# OpenCV 3 + Python 2.7 CMake template for macOS
PYTHON2_LIBRARY=/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/config/libpython2.7.dylib
PYTHON2_INCLUDE_DIR=/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7/
PYTHON2_EXECUTABLE=/Library/Frameworks/Python.framework/Versions/2.7/bin/python

cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib/modules \
    -D PYTHON2_LIBRARY=$PYTHON2_LIBRARY \
    -D PYTHON2_INCLUDE_DIR=$PYTHON2_INCLUDE_DIR \
    -D PYTHON2_EXECUTABLE=$PYTHON2_EXECUTABLE \
    -D BUILD_opencv_python2=ON \
    -D BUILD_opencv_python3=OFF \
    -D INSTALL_PYTHON_EXAMPLES=ON \
    -D INSTALL_C_EXAMPLES=OFF \
    -D BUILD_EXAMPLES=ON ..

# Compile and install OpenCV on macOS
make -j4

# Sym-link your OpenCV 3 + Python 2.7 bindings
cd /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages
ls -l cv2.so 
# -rwxr-xr-x  1 root  admin  3694564 Nov 15 09:20 cv2.so

# Testing your OpenCV install on macOS
python
# >>> import cv2
# >>> cv2.__version__
# '3.1.0-dev'
# >>>

#Include cv2 to the project
ln -s /Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages cv2.so