upgrade python to 3.7 mac code example

Example 1: upgrade python version mc

brew install python3
brew update && brew upgrade python
alias python=/usr/local/bin/python3

Example 2: mac os install python 3

brew install python3

Example 3: which python mac

$ brew update && brew upgrade python

Example 4: mac catallina python3

$ brew install pyenv

Example 5: install python 3.4 mac terminal

$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"