install tmux in mac code example

Example: install tmux on mac

1. Press Command+Space and type Terminal and press enter/return key.
2. Run in Terminal app:
ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null
# and press enter/return key.
# If the screen prompts you to enter a password, please enter your Mac's user password to continue. When you type the password, it won't be displayed on screen, but the system would accept it. So just type your password and press ENTER/RETURN key. Then wait for the command to finish.
3. Run:
brew install tmux
# Done! You can now use tmux.