---
title: kIOAccelSurfaceShapeStaleBackingBit
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.4+]
path: kernel/eioaccelsurfaceshapebits/kioaccelsurfaceshapestalebackingbit
---

# kIOAccelSurfaceShapeStaleBackingBit

## Declaration

```occ
kIOAccelSurfaceShapeStaleBackingBit = 0x00000020
```