This article details how to install PGP Command Line on Mac OS X systems.
To install PGP Command Line on a Mac OS X system:
The Mac OS X PGP Command Line application, pgp, is installed into /usr/bin/.
After you run PGP Command Line for the first time, its home directory will be created automatically in the directory $HOME/Documents/PGP. This directory may already exist if PGP Desktop for Mac OS X is already installed on the system.