解决方案:
http://stackoverflow.com/questions/28063598/error-while-executing-plist-file-path-had-bad-ownership-permissions
主要是以下的两个命令行:
sudo chown root /Library/LaunchDaemons/myfile.plist
sudo chgrp wheel /Library/LaunchDaemons/myfile.plistmac Path had bad ownership/permissions
原文：http://www.cnblogs.com/xzjxylophone/p/5466811.html