

Look for Image Capture, Aperture, Lightroom, EOS Utility, Dropbox and so on. Check that no other application on your Mac is trying to access the camera at the same time.Failure to do so will prevent the app from being able to talk to your camera. If you have macOS 10.15 Catalina you should verify that you’ve granted ShutterCheck the permission to access USB-connected cameras.Active Wi-Fi interface completely disables camera’s USB communication abilities. Make sure that built-in camera Wi-Fi is disabled if you have a Wi-Fi capable device (such as EOS 6D and 70D).The full list of supported cameras is available on ShutterCheck’s specs page. Check if your camera is supported by the app.Updates can be downloaded from within the app. Make sure you’re running the latest ShutterCheck version.

Please follow these steps in order to fix the issue:
