When testing possibly of migrating to newer macOS queue #1368 (comment), we encountered an issue where the precompiled MacCatalyst System.AppContext.Tests.app and iOS.Simulator.PInvoke.Test.app don't run on macOS 15 with error message:
_LSOpenURLsWithCompletionHandler() failed with error -54.
This could mean that the app is missing some required entitlements or might have to be rebuilt with newer XCode to work properly on newer macOS.
The queue seem to be configured properly as the dotnet/runtime MacCatalyst jobs are running as expected https://dev.azure.com/dnceng-public/public/_build/results?buildId=982758&view=results.