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Click on Disk First Aid at the top of the window.Open the hard drive, then /Applications/Utilities.We recommend using the Disk Utility to repair disk permissions - this may take anything from several up to 30 minutes to complete so please plan for this.For more information on the Reset Printing System feature, click here to view Apple's support article.
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If you don't see a list of printers, Control-click on the option 'Click to add a printer or fax' and select Reset printing system.Open Printers & Scanners / Print & Fax / Print & Scan, then right-click / Control-click the list of printers on the left side of the window and select Reset printing system from the menu that appears.Open the Apple menu then System Preferences.
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