my OSX version is 10.11.16 El Capitan
I downloaded the DMG for 10.11.+
Ran the pkg. It apparently installed. All the other files are present, as listed in the help file.
But the file /System/Library/Extensions/Phidget.kext is not there.
It seems that the .kext file has been put into the other Library....
There are 2 on my mac.... one under /system/library and another /library/ at the same level as the system folder.
However when I move the .kext file I still get the same error message form the Control Panel saying "Phidgets driver failure Kext load failed (Code: 4).