What is “p0f” Package?

Versatile passive OS fingerprinting, masquerade detection tool
For more details: http://lcamtuf.coredump.cx/p0f3/

Installation

• Open Terminal by pressing command+space then type terminal and hit Enter key.
• Install homebrew first.

  ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null

• Install p0f.

  brew install p0f

Now, use p0f!