I have an issue with Aquamacs. When press something like C-c a t (= org-todo-list in org-mode) the minibuffer shows an error message that there is no keybinding for ^C A, despite Shift is neither pressed nor locked. I tried this with various other keybindings, yet to no avail.

Any ideas?

  • What's the exact message you get when you do C-h k C-c a? Commented Jul 16, 2015 at 10:43
  • On pressing C-h k I am asked to Describe key (or click or menu item):, and when I then press C-c a the same error message appears: ^C A is undefined. Commented Jul 16, 2015 at 11:45
  • I don't use Mac so couldn't help more other than asking you to verify if you see the same problem in an emacs -Q session. Launch emacs -Q, bind C-c a to org-agenda and then do C-h k C-c a. Commented Jul 16, 2015 at 13:46
  • Can you please paste in your question the exact and complete buffer contents when you do C-h k C-c a? You using ^C A looks very strange to me. Emacs should be reporting C-a or C-S-a as far as I know. Commented Jul 16, 2015 at 14:17
  • Well, the buffer is empty: I opened a fresh new "Untitled" buffer and started org-mode. When I press C-h, the minibuffer shows ^C H (that is with a capital H), I then told to enter a letter or ? for a list of options in the minibuffer. If I press C-c a the same error message appears as mentioned in my question. Commented Jul 16, 2015 at 14:50

1 Answer 1


The key binding is not set-up by default, it is a just a recommendation from org-mode. You need to add something like

(global-set-key "\C-ca" 'org-agenda)

to your init file, or Preferences.el for Aquamacs. In my init file I have

(global-set-key "\C-cl" 'org-store-link)
(global-set-key "\C-ca" 'org-agenda)
(global-set-key "\C-cb" 'org-iswitchb)
(global-set-key "\C-cc" 'org-capture)

Part of the reason for this is that C-c sequences are meant to be reserved for user defined short cuts. Without these definitions you can always type for example M-x org-agenda to run the agenda command.

  • I am confused why he is emphasizing that emacs reports the binding as ^C A with uppercase A. It's also strange to read ^C A instead of C-S-a or C-a. I don't think emacs would ever report C-S-a binding as C-A. Commented Jul 16, 2015 at 14:15
  • @AndrewSwann: that would be quite annoying, considering the hundreds of keybindings explained in detail in the manual, which I even bought in print. Moreover, I am pretty sure I tried the agenda view some days before, and the keybinding worked at that time. I installed Aquamacs plain vanilla and didn't tinker with any of its configuration files. Commented Jul 16, 2015 at 14:57
  • @SingulaereEntitaet C-c a has to be bound by the user. Based on our discussion in the comments, implementing Andrew's solution should fix your problem. As per Activation - Org Manual, C-c a is a suggested binding; user can bind as suggested if they wish. Emacs cannot ship with pre-bound C-c SINGLE-LETTER bindings. Commented Jul 16, 2015 at 15:00
  • I stand corrected, @kaushalmodi. Commented Jul 16, 2015 at 15:16

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