compile librealsense on MacOS with Python bindings

compile_librealsense.sh

# install dependencies
brew install libusb cmake pkg-config

git clone https://github.com/IntelRealSense/librealsense.git
cd librealsense
mkdir build
cd build

# cmake with python bindings
cmake -DBUILD_PYTHON_BINDINGS=bool:true ..

# add libusb's path to LIBRARY_PATH.
# the path may differ, you can use tools like locate to find the path containing libusb.xx.dylib
export LIBRARY_PATH=/usr/local/Cellar/libusb/1.0.22/lib:$LIBRARY_PATH

# compile the project
make -j4

# install binaries, static libs and dynamic libs system-wide
sudo make install

# check if the project is compiled and installed successfully
realsense-viewer