: Ensure your Mac is showing full extensions so you aren't being tricked by a file named "Apple.anom.app" or "Apple.anom.dmg".
If the file appeared unexpectedly (e.g., in a downloads folder or via email): Apple.anom
: Select the file in Finder and press Cmd + I . Check the "Kind" field; macOS may already have a generic Uniform Type Identifier (UTI) assigned even if it doesn't know the specific app. 3. Safety and Security : Ensure your Mac is showing full extensions