8620 stopped printing duplex

[msLadyDay]

8620 has stopping printing duplex

[Anand_Andy]

Hi @msLadyDay,

Welcome to the HP Support Community

I'd like to help!

I understand you are unable to duplex print.

Try updating mac and printer firmware

To update the printer's firmware, refer - to HP Printers - Updating or Upgrading Printer Firmware 

 To update your Mac, try these steps - How to update the software on your Mac

Follow the instructions to perform duplex printing.

Set up a two-sided (duplex) printing job from a Mac computer with an HP printer.

To avoid page ordering issues, load enough paper into the paper tray to complete your print job.

NOTE:

To avoid paper jams, do not print on both sides of envelopes, photo paper, glossy paper, or transparencies. Do not print on paper lighter than 60 g/m2 (16 lb) or heavier than 105 g/m2 (28 lb).

Determine if you want the pages to read as a booklet or a tablet.

Callout

Description

1

Booklet layout

2

Tablet layout

Open the document, click File > Print, and then click Show Details.

If the Two-Sided setting is available, select the checkbox to enable it. Then from the unnamed print options menu, select Layout, select Long-Edge binding for booklet layout or Short-Edge binding for tablet layout from the Two-Sided menu, and then click Print.

Hope this helps! Keep me posted. 

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