# Unknown

> Unknown iOS version, managed by user.

## Definition

* **Type:** Field
* **Namespace:** [UnityEditor](/engine/6000.7/script-reference/unityeditor.md)
* **Assembly:** UnityEditor.CoreModule

> **Warning:**
>
> **Deprecated.** targetOSVersion is obsolete, use targetOSVersionString

```csharp
Unknown = 999
```