Mac OS X Softwares to Digital Signatures

GPGMail is a robust extension for Apple Mail, seamlessly integrating OpenPGP encryption and digital signatures directly into your email workflow for enhanced privacy and security.

GPGTools is a comprehensive suite of open-source software for macOS that empowers users with the ability to encrypt, decrypt, sign, and verify emails and files using the OpenPGP standard. It seamlessly integrates with Apple Mail and provides a secure gateway for sensitive communications and data handling.

GNU Privacy Guard (GnuPG or GPG) is a free and open-source implementation of the OpenPGP standard, widely used for encrypting and signing data and communications. It provides a robust suite of command-line and graphical tools to protect sensitive information.

Preview is the native image and PDF viewer for macOS. It offers essential tools for viewing, annotating, and basic editing of these file types directly within the Apple ecosystem. Designed for efficiency and low resource use, Preview provides a seamless and integrated experience for handling common document and image formats on Mac computers.