In order to check whether System Integrity Protection (SIP) is enabled or disabled on a Mac running OS X El Capitan, you can use the csrutil command to report on SIP’s current status.
To check if SIP is enabled or disabled, run the following command in Terminal:
This command can be run without root privileges and will tell you if SIP is on or off.
If SIP is enabled on 10.11.0 or higher, you should receive the following message:
System Integrity Protection: enabled
If SIP is disabled on OS X 10.11.0 or 10.11.1, you may receive a confusing message which indicates that SIP is enabled, followed by a list of individual SIP functions which are disabled. If all functions listed are showing as being disabled, SIP is completely disabled.
System Integrity Protection status: enabled (Custom Configuration).
Apple Internal: disabled
Kext Signing: disabled
Filesystem Protections: disabled
Debugging Restrictions: disabled
DTrace Restrictions: disabled
NVRAM Protections: disabled
This is an unsupported configuration, likely to break in the future and leave your machine in an unknown state.
It appears that Apple has updated the status message on OS X 10.11.2 to make it much more clear when SIP is disabled. On 10.11.2, if SIP is disabled, you now should receive the following message:
System Integrity Protection: disabled
Check also How to enable/disable SIP