What is “proguard” Package?

Java class file shrinker, optimizer, and obfuscator
For more details: https://proguard.sourceforge.io/

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 proguard.

  brew install proguard

Now, use proguard!