Hello,
the problem is the lack of record "mbasd = 1" in the system. To solve this problem you need to open the "/Library/Preferences/SystemConfiguration/com.apple.Boot.plist." and edit "apple.Boot.plist" - Text Edit is sufficient.
The key "Kernel Flags" is empty. You must add between start and end string "mbasd = 1" and the problem is resolved.
Oh one more problem: to manipulate the system, you must be "root" user and is not the end, because in this version of OSX is active
the "System Integrity Protection" or SIP for short. This is actually a way for Apple to push again the limits of the safety of your machine, prohibiting all users (including God Root) touching some critics judged files.
So even root will not have the right to go to copy any document in the following folders:
/ System
/ bin
/ usr
/ sbin
The idea behind this, is obviously to protect the user against any possible threat, a risk that weighs increasingly heavy with the growing popularity of OS X. After the much-maligned "Gatekeeper" (which required developers to sign their applications), Apple demanded that the systems extensions are in turn signed (and thus validated). Now it is the entire system that was padlocked. By doing so, Apple protects against particular vulnerabilities already present in OS X, and sometimes allow to "mount" the privileges of a normal user, to become administrator of the machine.
Fortunately for developers and hackers, there are (still) a way to disable SIP. To do this, reboot into "Recovery" mode (Command-R at startup) and run a terminal.
Then type the following line:
csrutil disable
Reboot and everything will be as before: the root and the administrator will again play with the system files.
I imagine you know how to activate root account :-)