I have a Mac OS Catalina 10.15.7. I can't find a driver for Epson Perfection 4490 Photo scanner.

Welcome to Apple Support Community.

You don't need a driver. Follow these steps:

• Set up a scanner to use with Mac - Apple Support
• Scan images in Image Capture on Mac - Apple Support

Jack

If for some reason you cannot get the scanner to work after trying Jack's suggest, you can also use VueScan. To find it, please navigate to www.hamrick.com and download the free trial version to test it. If you find you like it then you can purchase it.