Note: The GPGTools team adds the following:
We strongly recommend downloading the GPG Suite instead of this single tool, if you want to use mail and or file encryption on your mac. GPG Suite includes GPGMail.
- Fully compatible with OS X 10.9 Mavericks: Mavericks is here and so is GPGMail! We are proud to announce that from today on GPGMail officially supports OS X 10.9.
- Change "Encrypt/Sign by default" in GPGMail preferences: Our most popular request: it's now possible to change "encrypt/sign by default" in GPGMail preferences. more...
- OS X 10.7 or later