http://macappstore.org/putty/

Install the App

  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. Wait for the command to finish.
  3. Run:
    brew install putty

Done! You can now use putty.