There is a bug currently which makes the game run only in quarter resolution on an AppleTV4K. But I assume it would work fine on a non 4K Apple TV.
Controller works as well, but need to disconnect the Apple TV remote. Thanks to the developer for the hint to disconnect the AppleTV remote.
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Development build for Mario64 running on AppleTV4k.
Source code and build instructions available here.
https://github.com/ckosmic/sm64ex-ios...)
Thanks to the developers.