What is “sha1dc” Package?

Tool to detect SHA-1 collisions in files, including SHAttered
For more details: https://github.com/cr-marcstevens/sha1collisiondetection

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 sha1dc.

  brew install sha1dc

Now, use sha1dc!