What to expect when upgrading to macOS 27

Applies to: Popup and Notify for Mac | Uniprint

Overview

Users who upgrade a Mac from macOS 26 to macOS 27 will notice that the Pharos Popup and Notify Clients stop working. This is expected, and it isn't a Uniprint outage or configuration issue. MacOS 27 removes Rosetta by default, and the Popup and Notify Clients currently require Rosetta to run. Once Rosetta is installed, the Popup and Notify Clients resume working exactly as it did on macOS 26. No Pharos update is required.

Root Cause

The Popup and Notify Clients include a set of Intel-based components that run under Rosetta translation on Apple Silicon Macs. Starting with macOS 27, Rosetta is no longer installed automatically, so these components can no longer launch until Rosetta is added back manually. Apple has also announced that Rosetta support for Intel-based apps will end entirely in macOS 28. MacOS 27 still supports it, it simply isn't preinstalled. The affected components are:

Notify
Popup
PopupConfiguration
Uninstaller

Because these apps can no longer run, the broader Pharos print service has no way to process jobs, which is what users experience as the app being incompatible.

What Users Will See

When the user prints, the print job will fail and an error notification will be displayed in the menu bar. Clicking it shows a “The printer software is not compatible” message.

2. “Support Ending for Intel-based Apps” notice in System Settings

Under System Settings > General > About, a new “Intel-based Apps” entry appears, warning that support for Intel-based apps running under Rosetta will end in macOS 28. Rosetta itself is still supported in macOS 27, just not preinstalled. Clicking Details lists the affected apps, including all impacted Uniprint components: Notify, Popup, PopupConfiguration, and Uninstaller.

Resolution: Install Rosetta

Popup and Notify Clients do not require a new build to work on macOS 27. Installing Rosetta resolves the issue. There are two ways to install it.

Option 1: Let the app prompt for Rosetta

Opening the Popup Configuration app triggers a macOS system prompt titled “To use Intel-based apps, you will need to install Rosetta.” Clicking Install downloads and installs Rosetta automatically.

The challenge with this method is that the Popup Configuration app isn't easily accessible. It's located inside a nested system folder rather than the Applications folder or Launchpad:

/Library/Application Support/Pharos/PopupConfiguration.app

Users or IT staff will need to navigate to this path directly (for example, via Finder's Go > Go to Folder) and double-click the app to trigger the prompt.

Option 2: Install Rosetta via Terminal (recommended for IT/ scripted deployment)

Rosetta can be installed silently and without hunting for the app, by running the following command in Terminal:

/usr/sbin/softwareupdate --install-rosetta --agree-to-license

This is the more reliable option for IT teams rolling out macOS 27 across multiple Macs, since it can be scripted or pushed via MDM ahead of time.

Once Rosetta is installed by either method, Print Scout returns to normal: the menu bar icon becomes active, the “Service isn't ready” message clears, and the app resumes launching automatically on restart.

Recommended Guidance for Customers

If Pharos printing shows “The printer software is not compatible” after upgrading to macOS 27, install Rosetta using either method above. No Pharos update is required.
IT teams deploying macOS 27 at scale should proactively run the Terminal install command as part of the upgrade process, rather than relying on end users to install it.
Contact Pharos Support if the Popup and Notify Clients remain disabled after Rosetta is installed and confirmed.

Popup Client macOS27 Upgrade