Found the solution.
1 - Go to "Printers & Fax" in "System Preferences" delete the Espon there (PX660, or yours), just click on the printer and then on "-".
2 - Turn off the printer, and unplug the USB cable
3 - Delete:
for printer delete:
/Library/Printers/Epson/ (complete folder)
/Library/Printers/Receipts/<printer name>.pkg
/Library/Printers/Receipts/EpsonPrinterDrivers.pkg
/Library/Printers/Receipts/EsponPrinterDrivers2.pkg
/Applications/Epson Printer Utility/ (complete folder)
for scaner delete:
/Library/Preferences/Epson/Epson Scan
/User/<your user>/Library/Preferences/Epson/Epson Scan
/Library/Application Support/Epson Scan
/Library/Image Capture/Twain Data Sources/ (delete only the items of Epson)
/Applications/Epson Scaner Monitor (*)
/Library/Image Capture/Devices/Epson Scaner
(*) the epson scaner motitor will give u an error. to fix that erro go to:
apple -> System Preferences -> Accounts -> Login Items and then remove the monitor from the list, select it an then "-"
* the names can be not identical, i dont have the english version intalled on my mac, so i donno if the names are correct, any way its easy to understand.
4 - Empty trash and restart the Mac
5 - Download the correct files for your printer from www.epson.com, download the driver and the scaner.
6 - Install scaner, then the driver. Just mount the downloaded DMGs open and execute the only file inside (normaly named Vise)
7 - Go to "Printers & Fax" on "System Preferences"
8 - Turn on and conect usb cable of the printer on the Mac
9 - If the printer show up on list remove it
10 - Click on "+"
11 - It should show your printer, and your scaner (seperatly). If you have more than 1 printer (of the same), in my case i got:
A - EPSON Epson Stylus Photo PX660
B - EPSON Epson Stylus Photo PX660-1
C - EPSON pX660 (this is the scaner)
Add B and C, or if you otherwise add the ones you have.
For me the B and C were the ones that worked, if the B doesnt work for you, remove it, restart the Mac again, and add the A.
It should work now.
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If it still is not working.
Try to repair disk permissions.
/Applications/Utilities/Disk Utility/Repair Disk Permissions