i\'m running mongo 1.8.2 and trying to see how to cleanly shut it down on Mac.
on our ubuntu servers i can shutdown mongo cleanly from the mongo shell with:
Check out these docs:
http://www.mongodb.org/display/DOCS/Starting+and+Stopping+Mongo#StartingandStoppingMongo-SendingaUnixINTorTERMsignal
If you started it in a terminal you should be ok with a ctrl + 'c'
-- this will do a clean shutdown.
However, if you are using launchctl there are specific instructions for that which will vary depending on how it was installed.
If you are using Homebrew it would be launchctl stop homebrew.mxcl.mongodb