---
title: systemPrefersReducedResourceUsageDidChange
framework: Foundation
role: symbol
role_heading: Type Property
platforms: [iOS 27.0+, iPadOS 27.0+, Mac Catalyst 27.0+, tvOS 27.0+, visionOS 27.0+]
path: foundation/notificationcenter/messageidentifier/systemprefersreducedresourceusagedidchange
---

# systemPrefersReducedResourceUsageDidChange

## Declaration

```swift
static var systemPrefersReducedResourceUsageDidChange: NotificationCenter.BaseMessageIdentifier<UIApplication.SystemPrefersReducedResourceUsageDidChangeMessage> { get }
```