When installing GnuPG for OS X for the first time, control+click or right-click on Install.pkg and choose Open from the popup menu.Do not rely on the SourceForge SHA-1 checksum. Both the digital signature and the SHA-256 checksum were created on the build platform. Only if that method is unavailable because you lack a previous GnuPG version should you consider using the SHA-256 checksum provided in this document (see above).
The latest LTS version of GnuPG for OS X is 2.2.36 (released ):
The latest stable version of GnuPG for OS X is 2.4.0 (released ): Expect the LTS version to lack certain features available in the stable branch. Choose one of the following two available versions.