Apple removed support for 32-bit applications in macOS Catalina (10.15) and deprecated many legacy USB drivers. Canon’s last driver (version 19.2.0) is 32-bit and will not run on Catalina or newer.
Official support is non-existent for 64-bit macOS environments. Users have two options: canoscan 5600f drivers
The short answer is: This article explains your options, the risks, and how to keep this classic scanner functional. Apple removed support for 32-bit applications in macOS
Many users report success forcing the Windows 7 64-bit driver to install on Windows 10 and even Windows 11. Here’s how: canoscan 5600f drivers
Unplug the USB cable from your computer.