Good Morning! I have a 2013 Pro Retina that isn't sending out video quality above something like 480p to a 55" Hisense HDTV I use. Here's what I've gathered from troubleshooting so far: The laptop itself displays in max quality on its native display. The laptop will produce at least up to 1080p in other TVs. The Hisense will display in 1080p when hooked up to other HDMI sources, like my PS4. The TV says at the top that when the HDMI source is detected, that it is displaying 3820*2180p and 30Hz. I do not know what that means, in a practical sense. I don't have any tools to measure things, all I know is that I'm absolutely not seeing 1080p. Hisense is a garbage brand with useless customer service and you should never buy one. Spend the extra $200 for a standard brand. Does anyone have any ideas of what's happening and how to resolve? Any help much appreciated!