Xamarin application is not launched in Rider: Could not find a valid Xcode app bundle at '/Library/Developer/CommandLineTools'

Problem

• Xamarin application is not working with the error:

    Xamarin.Shared.targets(1931, 3): Could not find a valid Xcode app bundle at '/Library/Developer/CommandLineTools'. Please verify that 'xcode-select -p' points to your Xcode installation. For more information see https://aka.ms/macios-missing-xcode.

• .NET 9 and Xcode 16 are used

Cause [Optional]

Misconfiguration of the Xamarin and Rider tooling.

Resolution

One (or all) of the solutions below may help, however, it depends on each individually:

• Xamarain SDK installation is missing (which supports .NET 9 and Xcode 16);
• XCode.app must be used instead of Path for Commandline Tools in Settings | Build, Execution, Deployment | Apple Platforms;
• Workloads reinstall (might help after the SDK renew);
• Switch to the Nightly Build of Rider.