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Run tvOS 16.5 on the Xiaomi Mi Box S 3rd gen, from a USB Stick or directly from eMMC.
Screen captures
What works
GraphicsOpenGL ES and Metal work.Hardware video decodingHEVC, VP9 and H.264 in 1080p and 4K. HDR10 also works for HEVC and VP9.Video mode switchingThe output switches between SDR and HDR and between refresh rates.SDR to HDRSDR content can be shown in an HDR video mode.Video planeDecoded frames are sent straight to the display.HDMI videoPicture goes to the TV over HDMI.Multichannel audioE-AC-3 is decoded and sent to the TV as multichannel PCM over HDMI.Wi-FiWi-Fi connection works and has the expected speed.BluetoothPair a Bluetooth remote in Settings.HDMI-CECCEC TX/RX works. Remote inputs from TV work and sleep commands from tvOS.Sleep modeThe box goes to sleep and wakes again.CPU and GPU schedulingScheduling and throttling for the CPU and the GPU.
Install method
USB stickThe kernel, the tvOS system volume and /private/var are all on the stick. The box's own U-Boot starts it. With the stick out, the box starts Android.On the eMMCtvOS gets its own partition at the end of the box's internal storage, next to Android. Android's userdata is made smaller to make room.