Hoping someone can help me! Been running a Mac Mini server for years using Plex with no problems at all (10.7). Have my Harmony set up as an Apple remote and it started Plex from the desktop and allowed me to control the app perfectly, until I upgraded to Sierra the other week.......... Now it won't do anything! I've followed Apple's useless guide but I don't seem to have the check box needed under advanced settings in my security pane, very strange! Can anyone help? If it makes any difference my Wife has bought me the new harmony Elite for Christmas? Cheers!