fixed : connection error using Canon CanoScan 5600F with macOS 10.15 Catalina

Question :

I have been using my Canon CanoScan 5600F scanner for many years with my Mac, and it has always been working great. However : now, in macOS 10.15 Catalina I keep getting error messages that the scanner cannot be found…

Sometimes I manage to get things working by replugging the USB-cable and switching the scanner OFF and back ON, but that solution doesn’t last…

What can I do to solve this ?

 

Answer :

even though Canon does not list support for macOS 10.15 Catalina, the Canon driver that used to work in MacOSX 10.7 Lion through macOS 10.14 Mojave still works in macOS 10.15 Catalina, so if you do not have this driver already, download it here

To solve your problem, do this :

  • go to Apple-icon (top left in the menu bar) and click on “System Preferences” from the pulldown menu
  • in the “System Preferences” window, click on “Printers & Scanners”
  • in the list on the left, at “Scanners”, select your CanoScan 5600F
  • then, click on the Minus-button at the bottom of the list on the left, to delete the scanner from the list
  • now, switch OFF your scanner and unplug the USB-cable from the scanner and from your Mac
  • then, go to Apple-icon (top left in the menu bar) and click on “Restart…” from the pulldown menu
  • when prompted, UNcheck the option to reopen all open windows and restart your Mac
  • then, plug the USB-cable back into your scanner and your Mac and switch your scanner back ON
  • when your Mac has restarted, open System Preferences
  • in the “System Preferences” window, click on “Printers & Scanners”
  • in the list on the left, at the bottom, click on the Plus-button
  • in the window that opens, select your CanoScan 5600F from the list and click the “Add”-button
  • you can now select your CanoScan 5600F from the list on the left and click on the “Open Scanner” button on the right to open it
  • now, the “Scanner” window will open and you will be able to scan

Note : you might encounter the ‘scanner cannot be found’ error again… if so, just delete the scanner from System Preferences, then add it again… [if you cannot live with getting this error once in a while, and you cannot wait for Apple and/or Canon to come up with a definite solution… have a look at the VueScan scanner-app]

That’s it !

enjoy 😉