Not sure if this is a Canon thing or not. I switched from Nikon to Canon last year. To my surprised, I am not able to find a way to tell me how many actuations my camera has. I actually called Canon Tech Support and they told me not with the 5Ds. Can this be true?
The camera does internally count the shutter count... it just doesn't display it. I think some Nikon cameras even add the shutter count to the image meta-data. Canon doesn't do that.
The "official" answer to your question is that if you ever send the camera in to Canon service (e.g. mail it in to CPS for a cleaning, etc.) you can ask them to check the shutter count and they'll tell you what it is. But no Canon-provided consumer software displays this info.
I use a utility by Dire Studio called "Shutter Count" that runs on my mac and it displays the shutter count for most Canon bodies.