I'm on OSX El Captain and I would like to rename the file "
usr/bin/openssl" into "
usr/bin/openssl_old" (cause I want to update openssl) but when I try it says "operation not permitted" (even as root).
I tried :
-chmod ugo+w -chmod ugo+w
-csrutil disable (this one says "csrutil: failed to modify system integrity configuration. This tool needs to be executed from the Recovery OS."
-chown root /usr/bin/openssl -R -chmod 777 /usr/bin/openssl -R
please help !