Might be related to Rootless? "OS X adds a new feature called "Rootless" that keeps the root user found on Unix-based systems from being able to be run. This c

Might be related to Rootless? "OS X adds a new feature called "Rootless" that keeps the root user found on Unix-based systems from being able to be run. This can cause some troubles for disk management and backup utilities, so they included a way to turn it off. Open the Terminal and type sudo nvram boot-args="kext-dev-mode=1 rootless=0";sudo reboot to disable rootless and reboot your Mac. Only disable rootless if you know what this feature is used for, and you are experienced with the OS X command line." [1] [1] http://www.techradar.com/us/how-to/computing/apple/52-os-x-el-capitan-tips-and-tricks-1305433 http://www.techradar.com/us/how-to/computing/apple/52-os-x-e...