I download and installed this new application onto my MacBook Pro OSX 10.5.4 in the hope that it might improve the print quality on my Z33. Instead it prevented the printer from working at all after it had made a test page.
Eventually I had to go and get the old driver for 10.3 from the Lexmark site and reinstall to get my Z33 to function again.
Apple Lexmark Printer Drivers
For OS X 10.6 and lexmark printers.
Version: 2.1