buildcv2.txt

Steps to build OpenCV2 on AppleSilicon

brew install wget
wget -O opencv.zip https://github.com/opencv/opencv/archive/4.5.0.zip
wget -O opencv_contrib.zip https://github.com/opencv/opencv_contrib/archive/4.5.0.zip
unzip opencv.zip
unzip opencv_contrib.zip
cd opencv-4.5.0
mkdir build && cd build

cmake \
  -DCMAKE_SYSTEM_PROCESSOR=arm64 \
  -DCMAKE_OSX_ARCHITECTURES=arm64 \
  -DWITH_OPENJPEG=OFF \
  -DWITH_IPP=OFF \
  -D CMAKE_BUILD_TYPE=RELEASE \
  -D CMAKE_INSTALL_PREFIX=/usr/local \
  -D OPENCV_EXTRA_MODULES_PATH=<...>/opencv_contrib-4.5.0/modules \
  -D PYTHON3_EXECUTABLE=<PATH_TO_YOUR_PYTHON_EXECUTABLE> \
  -D BUILD_opencv_python2=OFF \
  -D BUILD_opencv_python3=ON \
  -D INSTALL_PYTHON_EXAMPLES=ON \
  -D INSTALL_C_EXAMPLES=OFF \
  -D OPENCV_ENABLE_NONFREE=ON \
  -D BUILD_EXAMPLES=ON ..

make

sudo make install

mdfind cv2.cpython & you get a few paths (select first (1))

cd <your python folder>/site-packages

ln -s /usr/local/lib/python3.10/site-packages/cv2/python-3.10/cv2.cpython-310-darwin.so cv2.so