Choose System Preferences from the Apple menu.
Choose Print & Fax (or Print & Scan) or Printers & Scanners.
Select the printer you use on [Printers], then click [-].
Delete the printers that are registered, then close the box.
Open Finder application of your Mac OS X.
Select [Go] → [Go to Folder] from the menu bar.
6. Enter the following folder locations, click [Go], then delete the files and folders.
Delete Example: You can delete files and folders by dragging them to the [Trash] icon in the Dock.
Files and folders to delete
Delete all the files in the folders.
When the [Authenticate] dialog box is displayed
Enter the administrator's name and password, and then click [OK].
7. Close all open windows.
8. Restart your computer.
Then, try adding the printer name again, by downloading and installing the update.
S H E F I N