---
title: kUSBInterfaceIDMask
framework: Kernel
role: symbol
role_heading: Enumeration Case
platforms: [macOS 10.12+]
path: kernel/1646366-anonymous/kusbinterfaceidmask
---

# kUSBInterfaceIDMask

## Declaration

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