Deleting the Printer Driver
When you have to remove the printer driver, for example, when reinstallation of the printer driver is necessary, remove the driver using the following procedure.
Open [System Preferences...] in the Apple menu, then click the [Printers & Scanners] icon.
In Mac OS X 10.7/10.8, click the [Print & Scan] icon.
Select the printer you want to delete, and then click [-] (or [Delete]).
The selected printer is deleted.
Close the screen.
Drag the files with the model name of this machine, which are located in [Library] - [Printers] - [PPDs] - [Contents] - [Resources] on the installed [Macintosh HD] (system hard disk), to the [Trash] icon.
Delete unnecessary files from [Library] - [Printers].
Drag the folder with the model name of this machine, which is located in [Library] - [Printers] - [KONICAMINOLTA], to the [Trash] icon.
Restart the computer.
This completes the deletion process of the printer driver.