I have to often issue commands like: vagrant up, or vagrant reload and OSX wants to be sure that I know what I am doing so it cleverly asks for my password. Thanks to the efforts of a very smart coworker, there is a workaround to this problem.
First do:
which sed
and replace the /usr/bin/sed below with your path to sed)
These go under cmd alias specification section
Use this command to edit /etc/sudoers (don't do it directly):
sudo visudo