install flutter on mac with big sur code example

Example 1: add flutter to path mac permanently

Open Terminal
nano ~/.zshrc
Add: export PATH=[PATH_TO_FLUTTER_GIT_DIRECTORY]/flutter/bin:$PATH 
Run: source ~/.zshrc
restart terminal
Run: flutter doctor -v

Example 2: flutter setup macos

if your terminal doesn't see "flutter" you have to use  
Open terminal and paste 

export PATH="$PATH:`pwd`/flutter/bin"
and then try "flutter" && "flutter doctor"