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iMac Pro, Safari v18.0.1, OS Seqoia 15.0.1
For some reason Safari does not provide an option to watch 4K video on Youtube. Using Chrome on the exact same Mac it works fine. I seem to remember having issues with 4K and Safari before. Has anyone else noticed this?
iMac Pro, macOS 15.0
YouTube uses a variety of different codecs for their videos at various resolutions. Many 4K videos on that site have been encoded with VP9, with may be supported in Chrome, but not with Apple’s player framework as used by Safari.
After doing some research it looks like this could be a bug in Safari 18 on Intel Macs.
On an iMac Pro(intel), Safari will not play 4K Video on YouTube. On MacBookPro(M1), Safari will play 4K video on YouTube.
Both Macs use the same OS etc
That's interesting. It doesn't for me. 1080p is the highest resolution I can select. Perhaps YouTube are doing some sort of A-B testing.
Thanks for your response. Something must have changed, until recently Safari was able to play 4K YouTube videos. Back to Chrome I guess.
It depends on the video. E.g. this one plays in 4K in Safari on Mac.
Safari no 4K video on YouTube
