Apple has recently released updates for both HP and Epson printer drivers. These driver updates enable compatibility with the latest HP and Epson printers.
If you are using either a HP or Epson printer with a Mac then you should firstly check software updates (Apple Menu > Software Update) to automate the update of the required files.
If your Epson or HP printer is not working and you are having problems locating driver files, then you may need to download the full driver package using the relevant link below (for OS X 10.6 or later)
Important: Only download the updates below if you have first tried the Software Update Utility mentioned above.