I’m new at this (posting, Apple computers etc,) my first question was in error. What I should have said was is there a recommended external 4K PLAYER that I should buy for my new 27” IMac with the 5K Retina screen as I have an extensive 4K dvd library that I want to play through my IMac?
Perhaps this will assist Writing an effective Apple Support Communities Question, when you say "player" we have no idea if you mean hardware or software. If you mean hardware and you are looking for an external DVD drive that plays 4K content, then I would STRONGLY recommend navigating to Macsales.com and speaking to them and they can help you select a product that will suit your needs.
4K player
