How to turn on System Integrity Protection (SIP) for your MacSystem Integrity Protection (SIP) should be on by default but, if it isn't, you can turn it on at any time.
Introduced as part of OS X El Capitan, System Integrity Protection (SIP) was designed to provide a type of root-level shielding to the Mac similar to what the iPhone and iPad have benefited from for years. It should be enabled on any new Mac running El Cap, and certainly running the current macOS Sierra. Some new MacBook Pro 2016 owners, however, have booted up their new machines to find SIP disabled instead. My guess is Apple is already hard at work on a fix, but in the meantime, here's how to turn it back on yourself!
How to check if System Integrity Protection is enabled on your Mac
Before turning SIP on, the first thing you need to do is make sure it isn't on already.
Launch Terminal on your Mac.
Type in "csrutil status" (or copy and paste it in from here).
If SIP is ON, you'll get this message in response: "System Integrity Protection status: enabled." If you see that,...
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How to turn on System Integrity Protection (SIP) for your Mac
