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# externalUnknown

An unknown external device type.

```
static let externalUnknown: AVCaptureDevice.DeviceType
```

## Discussion

In macOS, use this type to specify external devices, such as an iPhone camera.

> Important:
> In <doc://com.apple.documentation/documentation/UIKit/mac-catalyst> apps, use ``doc://com.apple.avfoundation/documentation/AVFoundation/AVCaptureDevice/DeviceType-swift.struct/builtInWideAngleCamera`` instead.

---

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