Install Keras/Tensorflow on Mac with cpu python2.7
I think what you read meant that tensorflow programs work much faster if your computer has a GPU. You need a Nvidia GPU in your computer to install tensorflow with GPU support on your Mac and as far as I know, after version 1.2 tensorflow no longer provides GPU support for MacOS
I recently found an article that indicates that the conventional methods for downloading python machine learning modules such as tensorflow and keras are not optimized for computers with a cpu.  How can I configure tensorflow and keras to make it most compatible with my processor on MacOSX in python 2.7?  
If it helps, I use pycharm to download most of my libraries and for my coding interface.