Safari in macOS Big Sur Works With 4K HDR and Dolby Vision Content From Netflix on Newer Macs
Safari 14, introduced in the iOS 14 and macOS Big Sur betas, introduces HDR video support and allows Netflix users to watch content in 4K HDR and Dolby Vision for the first time.

As pointed out by 9to5Mac, Netflix has long offered 4K content that can be viewed on other platforms like the 4K Apple TV, but it has not been available to Mac users due to hardware limitations.
Safari in macOS Catalina and earlier has limited Netflix content to 1080p resolution, but with macOS Big Sur, Netflix works in 4K and supports Dolby Vision and HDR10 for more vivid colors.
Watching 4K HDR content on Mac requires a Mac introduced in 2018 or later, so older Macs will continue to be limited to 1080p resolution on Netflix with macOS Big Sur.
As we covered last week, tvOS 14 and iOS 14 are now compatible with YouTube's VP9 codec, allowing 4K YouTube content to be watched on those platforms, but the codec is not yet supported in Safari 14 in macOS Big Sur.
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