kernelmanagerd runs as a standalone launchd daemon to handle requests from the kernel, and from other user-space processes to load kernel extensions (kexts) if they are available in a loaded kext collection. If a kext is requested for load that is not yet available for loading, kernelmanagerd will build the kext into the auxiliary kext collection for use on the next reboot. It is also responsible for launching driver extensions on the system.