// make sure homebrew is installed on

1) `$brew install python3` // brew install python3 on mac
2) `$pip3 install virtualenv` // use pip3 to install virtualenv on mac
3) Creation of virtualenv env inside your project:
`$ virtualenv -p python3 <desired-path>`
4) Activate the virtualenv:
`$ source <desired-path>/bin/activate`
5) Deactivate the virtualenv:
  `$ deactivate`

This way everything is installed for the project using virtual env.