This program really needs work. My OS is X v10.1. I have allready talked to an Epson Tech Rep., a nice person in Canada, but the problem pops again each time I try to print in the Classic mode I get a print error message suggesting that I turn the printer on and off again. That doesn't help. The rep then had me go into the Print Center and delete any pending jobs. Then I had to delete the selected Epson 900 printer and have the computer search the USB ports to come up with the very same printer choice, then sometimes I am able to print. For what was an expensive printer, Epson has done a poor job on its OS X software driver for this printer. Epson also has no update driver for its Perfection 636U scanner! These items may be the last I purchase from Epson unless they make a marked turn around in their software support for their products.