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The "System Settings applet" refers to the native data management tools built into your device's operating system. To clear the failed data:

of an installer that was already modifying system files.

Apple has historically been more aggressive about preventing partial installations through its strict package format (.pkg) and the App Store sandbox. However, partial installations can still occur—especially with third-party installers or interrupted macOS updates.

When you see this message, the system has detected "ghost" data—files that were written to your storage but weren't fully registered as a functional application.

Look for a title with a blank icon or a generic "loading" placeholder. Select it and choose Delete Software 2. Using DBI Homebrew (The Advanced Way) If the files aren't showing up in System Settings, use the DBI homebrew tool for a deeper clean: from the Homebrew Menu. Cleanup orphaned files