Uniprint - 'invalid certificate' message after upgrading to macOS 26 (Tahoe)

Apple have now released an update to macOS - 26.3, which contains a number of bug fixes and security updates.

While a fix for printing issues is not mentioned specifically - after testing, we have a number of confirmations that after updating to 26.3, print functionality returns to normal.

To update a University-issued Mac:

• Save any open work and ensure your Mac is connected to power
• From the Apple menu top left > System Settings > General > Software Update
• The system should make 26.3 available - choose Update now
• Allow the Mac to work through the update process - it will probably restart at least once.

In some cases - you may need to reinstall Uniprint Ricoh from the Self Service app on the University Mac.

We will respond to the remaining open calls we have for this issue with guidance.

If you have any further issues - please contact the IT Service Desk.

We have received a number of reports of issues printing to Uniprint, following an upgrade to macOS 26 (Tahoe)

This is presented as an 'invalid certificate' message in the print queue after sending a job.

This has been observed on staff and student devices.

The issue is being investigated, and we will provide updates accordingly.

Web Print remains available for those affected - please follow the guide below: https://www.st-andrews.ac.uk/guides/print-copy-scan/