I have discovered that my G4 PowerBook did not see the Epson RX730 printer after Mavericks was installed on my iMac. I downloaded the Epson software onto the G4 from the EPSON site and tried installing that way. It didn't work but also on the Epson dmg is an app called "Install Navi". Have your G4 ready to move, as it guides you through to taking the G4 next to the printer within 4 minutes of installation. The G4 then connects with the wifi Epson printer. I think that this problem first arose with Mountain Lion, but as I moved directly from Lion to Mavericks, I had not encountered the problem earlier.