How to stream 4K on tv.apple.com?

coffeeplease

macrumors member
Original poster
Sep 28, 2019
61
23
The quality of the stream seems to be low and I can't get it to stream in highest quality to my external 4K monitor. It looks like 720p is the most I'm getting. I can't use the TV app as I am still in Mojave. Is there a way to force 4K quality?