then, plug the USB-cable back into your scanner and your Mac and switch your scanner back ON.when prompted, UNcheck the option to reopen all open windows and restart your Mac.then, go to Apple-icon (top left in the menu bar) and click on “Restart…” from the pulldown menu.now, switch OFF your scanner and unplug the USB-cable from the scanner and from your Mac.then, click on the Minus-button at the bottom of the list on the left, to delete the scanner from the list. ![]() in the list on the left, at “Scanners”, select your CanoScan scanner.in the “System Preferences” window, click on “Printers & Scanners”.go to Apple-icon (top left in the menu bar) and click on “System Preferences” from the pulldown menu.NOTE : this solution is tested to work for the Canon CanoScan 5600F scanner, but will probably work as well for other CanoScan and LiDE scanners that run into the same problem and error message 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…Įven though Canon does not list support for your the CanoScan 5600F 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 The exact error message is this : “ Scanner reported an error Cannot communicate with scanner for these reasons: – Scanner is turned off. ![]() ![]() However : now, in macOS 10.15 Catalina I keep getting error messages that the scanner cannot be found… I have been using my Canon CanoScan 5600F scanner for many years with my Mac, and it has always been working great.
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