In the instructions in his WIKI there is a line:
It is better to use the stock kernel. If any custom kernel is selected then you will need to replace the System.kext with the one in /Library/Temp after applying the update.
Where will I need to put the System.kext that is put in /Library/Temp after the update? I did not use the stock kernel. I loaded the last one in the list of custom kernels.