In our ember.js based project after getting latest code and running following commands: npm install && bower install npm start when I was starting app, it was failing randomly with following error. (FSEvents.framework) FSEventStreamStart: register_with_server: ERROR: f2d_register_rpc() => (null) (-21) events.js:85 throw er; // Unhandled 'error' event ^ Error: watch EMFILE at exports._errnoException (util.js:746:11) at FSEvent.FSWatcher._handle.onchange (fs.js:1161:26) npm ERR! Darwin 14.5.0 npm ERR! argv "node" "/usr/local/bin/npm" "start" .... To solve this issue I