Yes, Epson's recommendation is correct. Double-clicking the scanner in the print & scan section of system preferences gives you Apple's rudimentary scanning capability. I highly recommend a third-party scanning program like VueScan.
Vuescan is fantastic and far more affordable than Silverfast which is outrageously priced. Mr Hamrick is great about support. He personally answers most questions in 24-48 hours via email. I would recommend the Pro version as it is much more flexible. I use Vuescan with my Coolscan 5000 and current Epson scanner.