Calibration
Select printer
Click on the Calibrate Color icon to launch the "Select printer" application.
You can also find the Maintenance Utility in the root/Library/Printers/HP/ hp designjet system maintenance folder which will launch the same application; "Select Printer". Here you need to choose your connection method to see the printer to calibrate. Local is for usb connected printers and Network is for Ethernet and shared printers. When you have the printer selected click "Utilities" to go to the web browser based calibration and maintenance tool.