Enumeration Case



kIOPMPreventIdleSleep = 0x00000040


In the capability field of a power state, disallows idle system sleep while the device is in that state.

For example, displays and disks set this capability for their ON power state; since the system may not idle sleep while the display (and thus keyboard or mouse) or the disk is active.

Useful only as a Capability.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software