---
title: vmnet_enable_virtio_header_key
framework: vmnet
role: symbol
role_heading: Global Variable
platforms: [Mac Catalyst 13.0+, macOS 15.4+]
path: vmnet/vmnet_enable_virtio_header_key-swift.var
---

# vmnet_enable_virtio_header_key

Enable virtio headers in all packets.

## Declaration

```swift
let vmnet_enable_virtio_header_key: UnsafePointer<CChar>
```

## Discussion

Discussion For more information, see 5.1.6 Device Operation in the Virtio specification You must not specify this property if vmnet_enable_checksum_offload_key is specified.