user_location.rb

# This is how you can get a user's location using MacRuby and CoreLocation
framework 'CoreLocation'

def locationManager(manager, didUpdateToLocation: new_location, fromLocation: old_location)
  puts "location: #{new_location.description}"
  exit
end

loc = CLLocationManager.alloc.init
loc.delegate = self
loc.startUpdatingLocation

NSRunLoop.currentRunLoop.runUntilDate(NSDate.distantFuture)