The latest version of ShutterCount is now available for both OS X and Windows.
The app now tries to retrieve shutter count information for non-certified Canon EOS digital cameras with a DIGIC III or newer processor (with the exception of the EOS-1D Mark III and EOS-1Ds Mark III).
You’ll get a warning message in these cases, but they should work (unless Canon chooses to change their PTP protocol extensions, of course). You can suppress these warning messages for each camera model separately.
Regarding the 1D Mark III and 1Ds Mark III – we get lots of requests to add support for these models. The bad news is that they do not provide shutter count information through the USB port, and thus cannot be supported. So please don’t ask for supporting them. It’s simply not possible. The same is true for pre-DIGIC III models, such as the original 5D, as well as everything else released before the 40D.
The latest Mac update is version 1.4 and is available on the Mac App Store. The latest Windows update is version 1.2, and you can update by choosing the Check for Updates… item in the Help menu.
This is a free update for existing users on both operating systems.