Coolestguidesontheplanet.com | Neil Gee
OSX 10.11 El Capitan ships with a new security process referred to as SIP or Security Integrity Protection also known as rootless.
What this essentially does is protect certain system level directories from being changes, notably
/System
/sbin
/usr
(but not /usr/local).
The setting can be altered by users wishing to add, edit or delete certain files in these folders.
Disabling SIP in OSX
Reboot your Mac into Recovery Mode by rebooting and holding down ‘option’ + ‘r’.
Launch a Terminal session and enter
Reboot
Re-enabling SIP in OSX
Boot into Recovery Mode again and this time
Reboot
You can see the status of SIP or rootless at any time not in Recovery Mode by just a command in the Terminal
What is SIP in OSX 10.11 El Capitan
Neil Gee