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    "iOS: 17.4.0 -",
    "iPadOS: 17.4.0 -"
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  "identifier" : "/documentation/MarketplaceKit/AppLibrary/App/installation-swift.property",
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# installation

The progress of the app’s installation.

```
@MainActor final var installation: AppLibrary.App.Installation? { get }
```

---

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