I\'ve installed mongodb and have been able to run it, work with it, do simple DB read / write type stuff. Now I\'m trying to set up my Mac to run mongod as a service.
If you feel like having a simple gui to fix this (as I do), then I can recommend the mongodb pref-pane. Description: https://www.mongodb.com/blog/post/macosx-preferences-pane-for-mongodb
On github: https://github.com/remysaissy/mongodb-macosx-prefspane