HomePod Firmware Possibly Reveals Apple Watch With LTE and 4K Apple TV With HDR10 and Dolby Vision

iOS developer Guilherme Rambo‏ has discovered a reference to a 4K HDR display mode in the HomePod’s firmware, lending credence to rumors that Apple is testing a fifth-generation Apple TV capable of streaming 4K resolution video.


HomePod doesn’t have a display, and iOS devices lack the resolution for native 4K playback, so the discovery likely pertains to the Apple TV.

Rambo also discovered strings kCADisplayModeDolby and kCADisplayModeHDR10, suggesting that a…
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