I replied to someone else's message in another forum about this but I ran into an issue with Mac OS 10.13.3. I was running everything perfectly for about a week (Emby 3.2.70) until I saw the dreaded update icon on my Mac Mini. When it was all said and done I went to open up Emby to get my TV going again and it would open and then crash within 20 seconds. I tried like 10 reinstalls and reboots and nothing worked (even tried emptying caches). I finally after about 2 hours or so tried Emby 3.2.6 and Low and behold it worked.
I tried to reinstall 3.2.70 again this morning and the same thing happened. I am running 3.2.60 again now. I wanted to Start a new thread in case any people are having the same issue that I had save an hour or two and let the developers know there is an issue with the OS update.