How to enable System Integrity Protection

System Integrity Protection (SIP) in macOS protects the entire system by preventing the execution of unauthorized code. The system automatically authorizes apps that the user downloads from the App Store. The system also authorizes apps that a developer notarizes and distributes directly to users. The system prevents the launching of all other apps by default.

If SIP has been disabled on a system, please check with the user to see why they have disabled it (an example may be a developer needs to test code to see if it works). If there wasn’t a reason to disable SIP, it should be reenabled by the following steps:

1. Restart your computer in Recovery mode.

2. Launch Terminal from the Utilities menu.

3. Run the command csrutil enable.

4. Restart your computer.

That’s it!