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- HP Community
- Printers
- Printing Errors or Lights & Stuck Print Jobs
- Critical error C5:9F:A6:0B

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03-27-2025 08:12 PM
I get this critical error C5:9F:A6:0B whenever I print pdfs on this brand new HP MFP 3301 printer from my MacBook Air OS 15.3.2, and the printer stops functioning.Any help is appreciated.
03-30-2025 09:11 AM
@Sastry2, Welcome to HP Support Community.
Thank you for posting your query, I will be glad to help you.
I'm sorry to hear you're encountering the critical error code C5:9F:A6:0B when printing PDFs on your HP MFP 3301 printer from your MacBook Air running macOS. Let's work through some troubleshooting steps to resolve this issue:
Restart Devices:
- Printer: Turn off your HP MFP 3301 printer, unplug it from the power source, wait for about 60 seconds, then plug it back in and power it on.
- MacBook Air: Restart your MacBook to refresh system processes.
Update Printer Firmware:
- Outdated firmware can lead to compatibility issues.
- Visit the HP Support website to check for the latest firmware updates for your HP MFP 3301 printer.
- Download and install any available firmware updates following the provided instructions.
Update or Reinstall Printer Drivers:
- Download the latest drivers from the HP Support website.
- To reinstall the printer on your MacBook:
- Go to System Preferences > Printers & Scanners.
- Select your HP MFP 3301 printer and click the – button to remove it.
- Click the + button to add the printer again, selecting the newly installed driver.
Reset Printing System on Mac:
- This can resolve underlying issues with the printing setup.
- Navigate to System Preferences > Printers & Scanners.
- Right-click (or Control-click) in the printer list and choose Reset printing system.
- After resetting, re-add your HP MFP 3301 printer.
Test with Different PDF Files and Applications:
- The issue might be related to specific PDF files or the application used for printing.
- Try printing different PDFs to see if the problem persists.
- Use alternative PDF readers, such as Adobe Acrobat Reader, to determine if the issue is application-specific.
Check for Paper Jams or Hardware Issues:
- Ensure there are no paper jams or obstructions in the printer.
- Inspect the toner cartridges and other components for proper installation.
Try using Airprint - About AirPrint - Apple Support
AirPrint is a built-in printing solution for Mac, iPhone, and iPad. You can print from most apps that have a print feature.
I hope this helps.
Take care and have a good day.
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Max3Aj
HP Support