---
title: externalUnknown
framework: avfoundation
role: symbol
role_heading: Type Property
path: avfoundation/avcapturedevice/devicetype-swift.struct/externalunknown
---

# externalUnknown

An unknown external device type.

## Declaration

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

## Discussion

Discussion In macOS, use this type to specify external devices, such as an iPhone camera. important: In Mac Catalyst apps, use builtInWideAngleCamera instead.

## See Also

### External devices

- [external](avfoundation/avcapturedevice/devicetype-swift.struct/external.md)