---
title: kUSBInterfaceIDMask
framework: IOKit
role: symbol
role_heading: Enumeration Case
platforms: [Mac Catalyst 18.4+, macOS 10.0+]
path: iokit/1426201-miscellaneous_constants/kusbinterfaceidmask
---

# kUSBInterfaceIDMask

## Declaration

```occ
kUSBInterfaceIDMask = kUSBMaxInterfaces - 1
```