Hans777 wrote:
Epson supplies no driver for the SC 1520 in OS X. It is special in being almost a plotter.
Manufacturers will only provide drivers for their peripherals for a period of time. The Epson SC 1520 is about 10 years old. The Epson support page for this printer shows that its support goes back to System 7. It makes no economic sense for Epson to expend the time and resources to write updated drivers in perpetuity.
Luckily, there are the Gutenprint drivers. It may take some experimenting with different print settings with these drivers to get the quality of printing you desire. In general, I have found that I need to set the print resolution/quality to a higher option than the default with my Epson printers while using the Gutenprint drivers to get the same output quality as was provided by the Epson drivers. This seems to the case especially for older Epson printers.
Matt