Two-sided (duplex) printing not working — enable & repair

Joe B.

Reviewed for technical accuracy

Specialities: Windows 11/10, macOS (Sonoma/Ventura/Monterey), Printers, Networking, Office Equipment

Duplex printing not working on Windows 10/Windows 11 or Mac — HP, Epson, Canon, Brother

Technician

Hey! Let’s get your two‑sided (duplex) printing working. Tell me the brand — HP, Epson, Canon, or Brother — and whether you’re on Windows 10, Windows 11, or Mac. Also, is the printer supposed to do automatic duplex printing, or do you flip pages manually (manual duplex)?

Customer

Windows 11 laptop, HP OfficeJet Pro. It used to print double sided. Now the double sided printing setting is greyed out and the printer won’t do duplex. Single‑sided works.

Technician

Got it. When duplex printing is not working on Windows 11/10 and the option is disabled/greyed out, typical causes are:
• The Windows queue isn’t set to “Print on both sides” by default or the Duplex Unit is not enabled in the device settings.
• A generic driver (e.g., Microsoft IPP Class Driver) replaced the vendor driver during an update; generic drivers often hide the automatic duplex feature.
• The model only supports manual duplex printing with prompts, not automatic (we’ll verify).
• Application‑level settings (Word/Adobe) override system defaults.
Quick plan: enable the duplexer in the driver, reinstall/repair the HP driver, then set app and queue defaults.

Customer

Where do I enable the duplex unit in Windows?

Technician

Enable duplex printing — Windows 10/Windows 11:
1) Settings → Bluetooth & devices → Printers & scanners → choose your HP → Printing preferences → set Print on both sides = On (or Automatic).
2) Click Printer properties → tab Device Settings (or Configuration) → set Duplex Unit (two‑sided printing) = Installed. If the option is missing, you’re likely on a generic driver.
3) If double‑sided is still greyed out, repair the printer driver for duplex printing: remove the queue, install HP Smart/Full Feature driver or HP Universal Print Driver (duplex supported), then add the printer again.

Customer

That helped! What about my MacBook? My partner’s Mac can’t find the duplex toggle either.

Technician

Enable duplex printing on Mac: in any app choose File → Print → open the layout or finishing section → set Two‑Sided = Long‑Edge or Short‑Edge. If it’s missing:
• Re‑add the printer as AirPrint or vendor driver and ensure the queue is not set to a Generic PostScript profile.
• System Settings → Printers & Scanners → select printer → Options & Supplies → Options → enable Duplex Unit (where available).
• For HP/Epson/Canon/Brother, installing the latest macOS driver often exposes the Two‑Sided control. This is the fastest Mac fix when printer not printing double sided.

Customer

How do I know if my model supports automatic vs manual duplex printing?

Technician

Automatic vs manual duplex printing:
• Automatic (auto‑duplex) printers have a built‑in duplexer that flips paper internally — the driver should show Two‑Sided or Print on both sides with edge binding options.
• Manual duplex prints odd pages first and prompts you to reinsert paper; apps like Acrobat and Word can guide page flipping.
• To confirm your device’s capability, check the printer name suffix (e.g., HP “dn” or Brother “DW” typically include duplex/Wi‑Fi) or the spec sheet. If your model is manual‑only, you can still get two‑sided output by choosing Manual Duplex in the print dialog.

Customer

It’s HP today, but my office also uses Epson and Canon. Any brand‑specific tips to fix duplex printing?

Technician

Fix duplex printing — HP / Epson / Canon / Brother:
• HP: Use HP Smart or the Full Feature Software. In Printer Properties → Device Settings, set Duplex Unit = Installed. For Universal Print Driver, pick the correct model with duplex support.
• Epson: Install the latest Epson Driver & Utilities. Enable Two‑Sided Printing in preferences; on macOS ensure the Epson queue (not Generic) is selected.
• Canon: With UFR II/Generic Plus drivers, open Device Settings → enable Duplex Unit. In apps select 2‑Sided and the binding edge. Re‑add as IPP (AirPrint) if the option is missing.
• Brother: Install Full Driver & Software Package or iPrint&Scan. In Advanced set Two‑sided and verify the model suffix (DW/DN) for auto‑duplex.

Customer

The toggle keeps disappearing after Windows Updates. Do I need to reinstall every time?

Technician

You shouldn’t have to. If duplex printing not working on Windows 10/11 returns, Windows likely swapped the vendor driver for a class driver. Do this once:
• Remove the printer and its driver package (Print Management → All Drivers) and restart.
• Install the manufacturer’s full package (repair printer driver for duplex printing).
• Disable automatic driver changes: Control Panel → System → Advanced system settings → Device Installation Settings → choose not to download manufacturer apps (optional in managed environments).

Customer

Any app‑specific gotchas? We use Word and Adobe Acrobat.

Technician

Word/Office: set File → Print → Print on Both Sides and also open Printer Properties to confirm the driver’s duplex setting. Save as default.
Adobe Acrobat/Reader: More Settings → enable Print on both sides of paper. If missing, you’re on a generic profile — reinstall the vendor driver.
Browsers/Google Docs: use System Dialog (Ctrl+Shift+P / Cmd+Option+P) to reach the real duplex options.

Customer

We sometimes need to force short‑edge for booklets. Can we default that?

Technician

Yes. Set the queue default to Two‑Sided: Short‑Edge (flip on short side) in the driver’s preferences, then apps inherit it. For booklet workflows, some Canon/Brother drivers add a Booklet preset that locks the correct binding and margins automatically.

Customer

Awesome — duplex works on both PCs and Macs now. Thanks!

Technician

Summary: If printer is not printing double sided or double‑sided printing settings are greyed out, enable the Duplex Unit in the driver, repair/reinstall the vendor driver, and set defaults in Windows/macOS and your apps. For brands — HP/Epson/Canon/Brother — the full feature driver exposes automatic duplex printing; use manual duplex only when the model lacks auto‑duplex. Need hands‑on help? Open the chat.

Quick answer: the accepted fix

Accepted fix when duplex printing not working (Windows 10/Windows 11/Mac): Enable the Duplex Unit in printer/device settings, reinstall or repair the printer driver for duplex printing (HP/Epson/Canon/Brother), and set Print on both sides (Windows) or Two‑Sided (Mac) as the default. If your device lacks auto‑duplex, use manual duplex printing with flip‑edge set correctly.

FAQ

Step‑by‑step (Windows 10/11)

1. Open Printers & scanners → your printer → Printing preferences → enable Print on both sides.
2. Open Printer properties → Device Settings → set Duplex Unit = Installed.
3. If missing, remove the queue and install the brand’s full driver (repair printer driver for duplex printing), then add the printer again.
4. In Word/Acrobat, save a duplex preset to make it the default.

Step‑by‑step (macOS)

1. Re‑add the printer as AirPrint or the vendor queue in System Settings → Printers & Scanners.
2. Options & Supplies → Options → enable Duplex Unit (if shown).
3. In the print dialog choose Two‑Sided and set the correct binding edge; save as a preset.

Sources

• Microsoft — Troubleshoot printer problems (Windows 10/11)
• Apple — Print on both sides of paper on Mac
• HP — Drivers & Software
• Epson — Drivers & Utilities
• Canon — UFR II / Generic Plus drivers
• Brother — Full Driver & Software Package

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