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macOS shows "Support Ending for Intel-based Apps" when launching BusyCal or BusyContacts

If macOS shows a notification that reads "Support Ending for Intel-based Apps — This version of 'BusyCal' (or 'BusyContacts') will not open in a future release of macOS" when you launch the app, you can safely ignore it.

Our apps are already Universal​

BusyCal and BusyContacts ship as Universal apps. The main application binary runs natively on both Apple silicon (M1/M2/M3/M4) and Intel Macs — no Rosetta translation is involved on Apple silicon.

The macOS warning typically refers to apps that contain only an Intel binary. That is not the case here.

Why does macOS still show the warning?​

macOS can also surface this warning when it detects an internal helper or auxiliary component inside an app bundle that hasn't yet been rebuilt for Apple silicon — even when the main app itself is Universal. The warning is generic and doesn't distinguish between the main app and a small embedded component.

In practice, this means the app continues to launch and run natively on Apple silicon as expected. There's no performance or compatibility impact from the warning itself.

What do I need to do?​

Nothing. You can continue using BusyCal or BusyContacts normally.

  • You don't need to reinstall the app.
  • You don't need to install Rosetta.
  • Your data, sync, and license are unaffected.

We're aware of the warning and plan to address it in an upcoming update so macOS no longer flags the app.

Still seeing issues?​

If the app itself isn't launching or you're seeing a different error, please contact support and include a screenshot of what macOS is showing.

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