---
title: kIOURLUnknownPropertyKeyError
framework: IOKit
role: symbol
role_heading: Global Variable
platforms: [Mac Catalyst 13.0+, macOS 10.0+]
path: iokit/kiourlunknownpropertykeyerror
---

# kIOURLUnknownPropertyKeyError

## Declaration

```swift
var kIOURLUnknownPropertyKeyError: IOURLError { get }
```