Mac Shutdown Problem

Mac OS 使用時.. 關機後.. 電源無法自動關閉解決方法..

sudo rm -f /System/Library/Extensions.mkext
sudo rm -f /System/Library/Extensions.kextcache
sudo rm -f /System/Library/Caches/com.apple.kernelcaches/*
sudo chown -R root:wheel /System/Library/Extensions/
sudo chmod -R 755 /System/Library/Extensions/