---
title: bDeviceSubClass
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 13.0+, macOS 10.2+]
path: iokit/iousbdevicequalifierdescriptor/1425795-bdevicesubclass
---

# bDeviceSubClass

## Declaration

```occ
uint8_t bDeviceSubClass;
```