Simply learn yourself.
For iMac

How to remove old printer software from iMac

Remove Old Printer Software From Imac

Bought a new printer for printing documents and still confused how to remove software or drivers of older one. Keep calm, this instruction page will guide you step-by-step. It is generally recommend to delete the software of older printer if you don’t use it to eliminate any confusion. You can remove old printer software from iMac before installing the software of new one by following these steps .

Step 1: Navigate to the apple menu, click on the Apple logo located at the left side of the screen and select ‘System Preferences’.

Step 2: Under the Hardware Section select ‘Print & Scan’ option. A list of printers connected with your machine will appear on the left side of the window. Select the printer that you want to delete.

Step 3: In order to remove old printer from iMac, you need to click on (-) sign. (+) and (-) sign appears on the bottom of the list.

Step 4: After clicking on (-) sign you will see that the selected printer is deleted. Now you can add new printer as per your choice.