HI, sad as it is since Epson Printers really use the same language since Atari days, (escP), no idea who to blame other than Apple changing requirements without real need, but...
I have the identical problem. I contacted Epson about it, sending a link to this thread. They responded, in part
"unfortunately [Epson XP-200] is not compatible with Mac OSX 10.4. You might want to check our Workforce 545 model, it will work with your computer"
I don't think it is really worth pointing out that they list Mac OSX 10.4 as a compatible system and allow you to download Mac OSX 10.4 drivers for the Epson XP-200 ...
I have MG3120 connect to my iMac G3 Tiger 10.4.11. Works fine for me. It a duplex priner. Great!
Canon PIXMA MG3120 Wireless Inkjet Photo All In One Printer Copier Scanner
I have it connected by USB.
I have successfully refilled ink black ink carterage. Refill. copy. printer error msg. press reset button!