Record screen of Apple TV 4K, with XCode, but...
Maybe it just won't work?
I followed some instructions that seemed to set it up -- linking it as a device in Xcode, (screenshot, attached)
So, I got the Apple TV 4K listed as a device in Xcode.
Instructions were a YouTube video, How to take screenshots from a 4th generation Apple TV - YouTube
This for the previous generation of Apple TV but had the core idea, just had to link with WiFi not lightening connector.
Using Xcode I get SOME limited screenshots but not of actual movies or games playing. (see, attached).
Only screens where I select movies or episodes; not the episodes or movies playing.
The instructions said QuickTime could be used to record AppleTV movies, but
When I try to use QuickTime, I only get the option to record from Facetime camera.
no option to record from AppleTV (which the instructions said should be there)
iMac, macOS Sierra (10.12.2), Camera, music gear, Wacom tablet.