If you need to install Catalina on a different Mac or perform a "clean install," you must convert the app you downloaded into a bootable drive. How To Create A Bootable MacOS Catalina Install Drive
When downloading from third-party sources, exercise caution and ensure you're downloading from a trusted source to avoid malware and other security risks. descargar macos catalina 10.15 dmg
Catalina requiere al menos 20 GB libres. Usa la herramienta Almacenamiento de tu Mac para eliminar archivos grandes, vaciar la papelera y borrar cachés. The Catalina Archive: A Guide to Downloading macOS 10