mtr @0.87 (net) is no SUID anymore (as reinstalled under High Sierra) - now needs root to run

[SaintBol]

Reinstalled mtr under High Sierra, and suddenly mtr cannot be run without been root: it cannot open a raw socket. Reason: it's no longer installed with SUID flag.

But, exactly like traceroute, mtr needs to be SUID.

$ ls -l $(which traceroute) -r-sr-xr-x 1 root wheel 38128 21 sep 06:35 /usr/sbin/traceroute

but:

$ ls -l $(which mtr) -rwxr-xr-x 1 root admin 85396 30 sep 20:00 /opt/local/sbin/mtr

Workaround: sudo chmod u+s /opt/local/sbin/mtr

To fix, mtr should be installed with SUID flag (as it was before, and like traceroute is).