MAUI - The application has not been built

The key insight is simple: this error often points to architecture targeting, not an actual compile failure.

What you’ll learn

• Why M-series Macs can hit this issue with default MacCatalyst runtime settings
• How to update RuntimeIdentifiers for arm64 (and when to include multiple targets)
• What trade-offs differ between local-only builds and App Store distribution
• How to verify you’re building for the processor architecture you’re running

Why read it

This post helps you move from a confusing message to a concrete fix in minutes.