1、Make sure you've installed Brew, with this (wait until its done installing) (Edit: added ending quote to the end)
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
2、Then follow NEXT STEPS shown on command line, it should show something like this
==> Next steps:
- Add Homebrew to your PATH in /Users/$USER/.zprofile:
echo 'eval $(/opt/homebrew/bin/brew shellenv)' >> /Users/$USER/.zprofile
eval $(/opt/homebrew/bin/brew shellenv)
3、Copy and paste the first line on the same terminal window, then hit enter
echo 'eval $(/opt/homebrew/bin/brew shellenv)' >> /Users/$USER/.zprofile
4、Then Copy and paste the last line on the same terminal window, then hit enter
eval $(/opt/homebrew/bin/brew shellenv)