No power-off no sleep

Hi - I successfully updated to macOS Sierra on my Z77-UD5H by
- installed latest Clover (+Configurator) on El Capitan
- moved from MacPro 3,1 to iMac 14,2
- performed the update
- fixed audio

now everything is fine - except:
- I cannot do a Shutdown to PowerOff --> progress wheel (on dark screen) keeps running
- I cannot go to Sleep

Does anybody have advise ? on Clover settings perhaps ? others ?

thanks
Hausi