mac make python3 default code example

Example 1: use python3 as default mac

ln -s -f /usr/local/bin/python3.7 /usr/local/bin/python

Example 2: 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 3: mac catallina python3

$ brew install pyenv

Example 4: set python 3 as default mac

[ -e ~/.profile ] && . ~/.profile