A bit overkill, but this works as a sudo-ish replacement.
Assuming (as root):
... then set this rule where xxxx is your ordinary user's ID.
Then as the ordinary user ...
Apparently, 'root' is the default so you can omit the '-u' clause for a shorter syntax.
Assuming (as root):
sh:
root@host: $ id
uid=0(root) gid=0(wheel) groups=0(wheel),5(operator)
... then set this rule where xxxx is your ordinary user's ID.
sh:
root@host: $ sysctl security.mac.do.rules='id=xxxx>id=0,gid=0,+gid=0,gid=5,+gid=5'
Then as the ordinary user ...
sh:
ordinary@host: $ mdo -u root whoami
root
Apparently, 'root' is the default so you can omit the '-u' clause for a shorter syntax.
sh:
ordinary@host: $ mdo whoami
root