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Administrators explicitly seek out the standalone for several reasons: Host OS Compatibility : It is optimized for macOS Big Sur .
Apple does not officially host direct DMG downloads for legacy versions of Apple Configurator. Instead, they provide the latest version through the Mac App Store
Administrators can configure advanced properties such as "Ignore Manifest Scope" and the "Target Application Bundle Identifier" inside Web Clip payloads.
As Apple updates its software, newer versions of Apple Configurator often drop support for older macOS releases.
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If you need the specific legacy version 2.13.3 for a non-updated lab environment, you must have downloaded it when it was live. It is not legally available for direct download from Apple as a DMG anymore.