---
title: io_maxsegwritesize
framework: Kernel
role: symbol
role_heading: Instance Property
platforms: [macOS 10.6+]
path: kernel/vfsioattr/1523400-io_maxsegwritesize
---

# io_maxsegwritesize

## Declaration

```occ
u_int32_t io_maxsegwritesize;
```