Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
There is a simple reason for that, I'm sorry to say. The page for drivers at
does not show any driver issued from Epson for your printer model, since the 10.6.x version of MAC OS X.
There's no driver for it. (I also sought one for it in the Canada Epson website, and got the same lack of a result.)
What MAC OS X version did you have before the El Capitan upgrade? Was the printer working with that former version?
If it were Windows, you could load an older version of the OS (or a simulation thereof) and then use the driver in that older version perhaps, to print to it still.
As it is... do you know about Parallels? that is a Windows simulator you can run on MAC OS X. It might allow you to install the old printer's driver - for Windows of the appropriate version - in Parallels, and then allow printing to it. That's my one suggestion that might work, for allowing you to still use the old printer with the El Capitan version of MAC OS X that is now on your computer.