Learning OpenCV 4 Computer Vision with Python 3 - Third Edition

Using Homebrew with ready-made packages

Starting on a system where Xcode and its command-line tools are already set up, the following steps will give us an OpenCV installation via Homebrew:

1. Open a Terminal and run the following command to install Homebrew:

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

2. Homebrew does not automatically put its executables in PATH. To do so, create or edit the ~/.profile file and add the following line at the top of the code:

    export PATH=/usr/local/bin:/usr/local/sbin:$PATH

Save the file and run this command to refresh PATH:

    $ source ~/.profile

Note that executables installed by Homebrew now take precedence over executables installed by the system. ...