Apple has ceased to support 32-bit systems. Scanners lacking 64-bit drivers are not compatible with macOS 10.14 / 10.15.

For the last several years, Apple has been preparing to transition to a purely 64-bit system. In macOS 10.14 / 10.15, this step has been taken: 32-bit apps and drivers are no longer supported. In this new version, affected scanners will no longer function with SilverFast until their drivers are updated to support 64-bit.

At this point in time, some scanner manufacturers only provide 32-bit drivers, which are currently not supported by macOS 10.14 / 10.15. We thus urgently recommend that you contact your scanner manufacturer prior to updating to macOS 10.14 / 10.15 in order to determine the compatibility of your device.

You can find further information concerning this issue here:
https://support.apple.com/en-us/HT208436

Affected devices:

Canon:

• CanoScan 4400F
• CanoScan 8600F
• CanoScan 8800F

Epson:

• Expression 1680, Expression 1680 Pro, ES-2200
• Perfection 2400
• Perfection 2450
• Perfection 2480
• Perfection 2580
• Perfection 4490
• Perfection V10
• Perfection V100
• Perfection V200
• Perfection V30
• Perfection V300
• Perfection V33
• Perfection V330
• Perfection V350
• Perfection V37
• Perfection V370
• Perfection V500 (Internal tests are running.)
• Perfection V550 (Internal tests are running.)
• Perfection V600 (Internal tests are running.)

Important note:
The SilverFast update to version 8.8.0r14 is the last 32-bit SilverFast update for the affected devices under macOS. In the future, SilverFast will be developed solely in 64-bit.