Jul 25, 2013. Google's new Googlecast Software Developer Kit could change all that, though. Now that developers can make existing and future apps work with Chromecast, it's not hard to imagine some crafty app maker figuring out how to pull in local files too. (Yeah, I'm looking at you, Plex.) [UPDATE: A workaround. Once it’s connected, it will perform a quick firmware update process and show up as a networked…