the cable/TV works with my HDMI 2.1 PC, but not with the MacBook.
What's more annoying is the macbook doesn't allow me to change the refresh rate so I have no chance to try HDR at reduced framerate either.
Update: A new expensive optical cable fixed the problem. But this cheap cable still works great for PC, so I blame the Mac UI for not allowing me to set the custom settings which a PC could.
![](https://s2.save4k.ru/pic/Gn5r6QWY9Qg/maxresdefault.jpg)