---
title: avoidSync
framework: IOSurface
role: symbol
role_heading: Type Property
platforms: [iOS 11.0+, iPadOS 11.0+, Mac Catalyst 13.0+, macOS 10.6+, tvOS 11.0+, visionOS 1.0+]
path: iosurface/iosurfacelockoptions/avoidsync
---

# avoidSync

## Declaration

```swift
static var avoidSync: IOSurfaceLockOptions { get }
```

## Discussion

Discussion If you want to detect/avoid a potentially expensive paging operation (such as readback from a GPU to system memory) when you lock the buffer, you may include this flag. If locking the buffer requires a readback, the lock will fail with an error return of kIOReturnCannotLock.

## See Also

### Options

- [readOnly](iosurface/iosurfacelockoptions/readonly.md)