None of the above solutions worked for me. Is there any other way to be able to remove the file with "Operation not permitted" error? $ ls -lOe X11 lrwxr-xr-x 1 omeran staff restricted 8B Mar 24 2017 X11 -> /opt/X11 $ sudo chflags -hv noschg X11 $ $ sudo rm -rf X11 rm: X11: Operation not permitted