This works for me on my late-2014 iMac (OS X El Capitan 10.11.16)
brew install node
npm install -g sails
npm install
sails lift &
bin/load-data.js
Then point your browser to localhost:1337.
The final two steps of this initialization sequence (sails lift and bin/load-data.js) can be combined by specifying -e to the load-data.js script
bin/load-data.js -e
Actually, this erases the database before loading the data. WikiMess security[tm]!
Use the -s option to just load the data into the existing database, without erasing.
The script has lots more options; it crawls the data directory to pre-load corpora into the wiki database.
You can log in using Facebook authentication (via passport.js). You could probably edit the Facebook client ID & secret in config/passport.js to use your own Facebook account, in theory.