---
title: kIOSurfaceCopybackCache
framework: IOSurface
role: symbol
role_heading: Global Variable
platforms: [iOS 11.0+, iPadOS 11.0+, Mac Catalyst 13.0+, macOS 10.6+, tvOS 11.0+, visionOS 1.0+]
path: iosurface/kiosurfacecopybackcache
---

# kIOSurfaceCopybackCache

## Declaration

```swift
var kIOSurfaceCopybackCache: Int { get }
```