---
title: kIOSystemStateSleepDescriptionReasonKey
framework: IOKit
role: symbol
role_heading: Global Variable
platforms: [iOS 16.0+, iPadOS 16.0+, Mac Catalyst 15.0+, macOS 12.0+, visionOS 1.0+]
path: iokit/kiosystemstatesleepdescriptionreasonkey
---

# kIOSystemStateSleepDescriptionReasonKey

## Declaration

```swift
var kIOSystemStateSleepDescriptionReasonKey: String { get }
```