PyCharm packages issue I'm using PyCharm as Python IDE, on macOS High Sierra and my default Python version is 3.6.5,

I have a big issue within packages using PyCharm. As an example of my issue, I have installed Pillow using pip3 install Pillow

But, in PyCharm I'm not able to use it and PyCharm is thinking I did not install the Pillow package, and I had to install it through PyCharm package management.

But I don't like to continue developing like this, my question is, how should I force PyCharm to use packages that I installed through pip3 ?
Goto PyCharm > Preferences (COMMAND+,) > Project > Python Interpreter.
There should be a dropdown to select the required version of Python interpreter. Select your version of Python interpreter from the dropdown. If the required option does not exist, click show all and select your required version (Check to see the exact path of the python interpreter).