---
title: "init(URL:readOnly:cachingMode:synchronizationMode:)"
framework: virtualization
role: symbol
role_heading: Initializer
path: "virtualization/vzdiskimagestoragedeviceattachment/init(url:readonly:cachingmode:synchronizationmode:)-3wk02"
---

# init(URL:readOnly:cachingMode:synchronizationMode:)

## Declaration

```swift
init(URL url: URL, readOnly: Bool, cachingMode: VZDiskImageCachingMode, synchronizationMode: VZDiskImageSynchronizationMode) throws
```