---
title: kIOServicePMAssertionCPUBit
framework: driverkit
role: symbol
role_heading: Enumeration Case
path: driverkit/kioservicepmassertioncpubit
---

# kIOServicePMAssertionCPUBit

kIOServicePMAssertionCPUBit When set, PM kernel will prefer to leave the CPU and core hardware running in “Dark Wake” state, instead of sleeping.

## Declaration

```occ
kIOServicePMAssertionCPUBit
```