python update 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 why is python installed in usr and application

$ pyenv global 3.7.3
# and verify it worked 
$ pyenv version
3.7.3 (set by /Users/mbbroberg/.pyenv/version)

Example 5: command to install python3.6 on mac os

$ brew switch python 3.6.5_1