it works!

a very basic version

# clone the repo
git clone https://github.com/micromdm/scep.git
# download scep binary and place it in the scep repo root
# change the binary permissions to make it executable.
chmod a+x ./scep
# run scep binary inside the repo folder.
cd scep
# starts scep server at localhost:9001
./scep
# install sceptest.mobileconfig profile
# the CA and the SCEP signed cert will be added to your OS X keychain