I have upgraded from os x yosemite to el capitan, after upgrading I am trying to run "chmod u+s /usr/sbin/pppd" command to fix a error that I am getting in sonicwall netextender client.
Running the command gives the below error
chmod: Unable to change file mode on /usr/sbin/pppd: Operation not permitted
The file is marked as restricted when I list the files in /usr/sbin folder using "ls -lO" command.
Has anyone got a similar error when running chmod for a file marked as restricted?