I am using Aquamacs on OS X 10.9.4. I have the following lines in my Preferences.el file
(which is similar to the .emacs init file):
(add-to-list 'load-path "~/.emacs.d/")
(require 'fill-column-indicator)
(setq-default fci-mode t)
I use M-x fci-mode to manually toggle the column indicator.
How can fci-mode be enabled on startup using Aquamacs?