In 10.9.4 it is only a warning, but...The kext is not signed, but I had no problems with
loading it under OS X prior to Yosemite (the only issue was OS X warning)
Intel(R) Core(TM)2 Duo CPU T7500 @ 2.20GHz
MacBookPro3,1
ctl_id: 0x7 for ctl_name: crystalidea.macsfancontrol.kext
TjMax T: 0