I'm thinking of replacing my mini 2012 with a mini 2018 and an LG UltraFine 5K. I would like to keep my mini 2012 chugging along as a headless unit and connect to it remotely via Screen Sharing from my new mini. I know that the 2012 mini can't drive a 4K or 5K monitor, but would I be able to connect remotely to it through Screen Sharing and if so, what would be the resolution?