GPG on Mac

[FeLoe]

On Mac OS the decryption step only works after manually installing GnuPG, this need to be reflected in the requirements (not sure exactly how at the moment..).

Unlike most Linux distributions (which make heavy use of GnuPG for ensuring untampered software within their package repositories), Mac OS X does not bring GnuPG with the operating system, so you have to install it on your own.

Possible sources are:

Package manager Homebrew: brew install gnupg gnupg2
Package manager MacPorts: sudo port install gnupg gnupg2
Install from GPGTools, which also brings GUI applications and integration in Apple Mail

[vanatteveldt]

Good point. We probably need to think about the "pre-requirements", eg. things that need to be installed before the "doit" can do its work.

Does the python pip install step work out of the box?
Did you try the R/packrat step?