After an recent update of your OS your Lexmark X6650 probably stopped working like mine did. Whenever i wanted to print something I jsut got an Errormessage in the printing box: 

Missing component: /Library/Printers/Lexmark/Drivers/.Resources/5600-6600 Series Color 2.lut

Luckily theres an solution for that. All you have to do is oen your terminal and follow these steps:

Change to the driver directory
cd /Library/Printers/Lexmark/Drivers/.Resources

Hit return and copy the
sudo cp 5600-6600 Series Color 1.lut 5600-6600 Series Color 2.lut

Hit return again and after entering your password it should work again! 

Have fun printing with your Lexmark X6650 again!