The restriction was that that 4K needed to be on 7th Gen Intel or newer and Windows only. This was due to the requirements that the DRM used Intel SGX security

The restriction was that that 4K needed to be on 7th Gen Intel or newer and Windows only. This was due to the requirements that the DRM used Intel SGX security so if the underlying CPU did not have this tech then it cannot decrypt the disc. So no AMD, Apple or other ARM etc. The SGX security was recently cracked so I suspect this requirement is going away. The other platforms can easily play the underlying video format, its just the DRM that was preventing it. [1]:https://media.ccc.de/v/37c3-12296-full_aacsess_exposing_and_exploiting_aacsv2_uhd_drm_for_your_viewing_pleasure https://media.ccc.de/v/37c3-12296-full_aacsess_exposing_and_...