Here's a list of all HP Designjets -- click on the name of your Designjet and see if a driver is showing. Click on "HP Printers" to open the list.
WARNING: If you wish to use these drivers with Windows 10, you must "disable driver signature enforcement" BEFORE you download the driver -- or the driver won't work.
32 BIT multiple model DESIGNJET DRIVER:
64 bit multiple model designjet driver:
Fix HP Printer issue on macOS
A software component will damage your computer message displays when printing or while installing - Click Here