Something

c-24-18-64-107:ACPICPUThrottler root# kextload -vt ACPICPUThrottle.kext
kextload: kext /System/Library/Extensions/IONetworkingFamily.kext/Contents/PlugIns/AppleGMACEthernet.kext is not valid
kextload: resolving dependencies for kernel extensions with validation and authentication failures
kextload: extension ACPICPUThrottle.kext appears to be loadable
kextload: loading extension ACPICPUThrottle.kext
kextload: sending 1 personality to the kernel
kld(): Undefined symbols:
_sysctl__kern_children
_sysctl_handle_int
_sysctl_handle_string
_sysctl_register_oid
_sysctl_unregister_oid
kextload: kld_load_from_memory() failed for module /Users/Hak/ACPICPUThrottler/ACPICPUThrottle.kext/Contents/MacOS/ACPICPUThrottle
kextload: a link/load error occured for kernel extension ACPICPUThrottle.kext
link/load failed for extension ACPICPUThrottle.kext
 (run kextload with -t for diagnostic output)
c-24-18-64-107:ACPICPUThrottler root#