disk unreadable message El Capitan/Canon camera - how to fix?

Since the upgrade of El Capitan I get 'no disc not readable' when connecting Cannon camera via USB and also when you use the card reader.

If your OS X 10.11 upgrade (an earlier version of Mac OS X like OS X 10.10 or less) gives trouble that your previous version have not lived, check with your Canon camera support to see if he and the software you are using is compatible with El Capitan. Firmware or software of your camera may require update for compatibility El Cap.  If the Canon updates are not available, you should wait for them or go back to your version of Mac OS X older but functional.

If you really Update to a 10.11.x El Cap to the latest version, you can simply need to use OS X recovery completely reinstall Mac OS from the recovery system stored on your startup disk.

If you need help, when you post, tell us what Canon camera and the software, if any, you use as well as what number of version of Mac OS you updated to and from.  We will try to offer more specific suggestions based on the details in your response.

Post edited by: Jim EZ

Mac OSX 10.11.4

Tags: Mac

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