Dear Canon Cameras,
Why don't you keep your drivers and software up to date? Apple's release of Yosemite is no surprise and developer kits have been out there for months. Why is it that any photographer who switches to Yosemite or buys a new machine right now will not be able to use your utility to control his or her camera? I love your gear but your software and your responsibility to your users is not up to pare.
It is my experience, that this happens each time Apple upgrades their operating system. Months can go by before you get around to upgrading your camera utilities.