[macOS 26.4.1] Constant authentication prompts when printing via PaperCut (Mobility Print & SMB) - Keychain issue?
Hey everyone,
We're currently pulling our hair out over a sudden printing issue that has popped up after our users are updating their Macbooks to macOS 26.4.1 and newer. We are a company that provides IT-services for schools in a BYOD environment. Our users are constantly being prompted for their AD credentials every time they try to print ever since updating their Macs.
Our Environment:
- Client OS: macOS 26.4.1 (and newer...)
- Print Server: Windows Server 2022 running PaperCut MF.
- Directory: Active Directory (Users synced to PaperCut)
- Deployment: Printers are mapped either manually via SMB or installed using PaperCut Mobility Print.
The Problem: Whenever a user sends a print job, macOS throws an authentication prompt asking for their username and password. Even if the user checks the "Remember this password in my keychain" box, the system completely ignores it. The next time they print, the prompt is back.
Our Suspicion: Because this is happening across both SMB and Mobility Print queues, we strongly suspect this is a localized macOS issue rather than a PaperCut server issue. It seems like macOS 26.4.1 is either:
- Failing to write the print credentials to the user's Login Keychain properly. (We do see the credentials in the keychain, but it's very strange that the software does not read the credentials when printing again).
- Preventing the CUPS daemon/print spooler from reading those credentials from the keychain due to a new privacy/security restriction.
What we're looking for:
- Has anyone else encountered this endless auth loop on macOS 26.4.1?
- Are there any known workarounds? (e.g., wiping specific keychain entries, adjusting CUPS config)
- Does the Mobility Print client require a patch for this specific macOS build?
Any insights or shared misery would be greatly appreciated. Thanks!