4K & macOS high Sierra

Discussion in 'macOS High Sierra (10.13)' started by zaxven, Jun 7, 2017.

  1. zaxven macrumors member

    Sep 18, 2014
    with introduction of HEVC support.. safari still caps to max 1440p. Chrome shows 2160p (4K) but stutters hell lot. Only Opera beta, is able to play 4K video smoothly.

    Check this video:

    even with a 4K montior hooked externally, sadly safari still doesn't play.

    Has any of you been able to run it? What 's your thoughts..

    Fyi, Netflix quality has improved with higher bit rates on new safari.
  2. zaxven thread starter macrumors member

    Sep 18, 2014
    Just found SAFARI TECHNOLOGY PREVIEW ADDS 4K option (build 32).. and it runs smooth.
    has features like WEBGL 2.0, WEB GPU and ability to remove legacy WEB RTC API among others.
  3. yellowscreen macrumors regular


    Nov 11, 2015
    i presume you have non retina iMac? could you try 4k 60fps youtube? or 1440p 60fps? thank you
  4. Superhai macrumors 6502


    Apr 21, 2010
    It is because of google codecs. You should be able to run this for now (8k)
  5. redheeler macrumors 603


    Oct 17, 2014
    Screen Shot 2017-06-19 at 8.57.10 AM.png
    (Screenshot is from Safari Technology Preview 33 on MacOS High Sierra, still no 4K option)
  6. eyeangle macrumors regular


    Jan 2, 2014
    Melbourne, Australia
    If I buy an internal UHD Blu-ray player for watching 4K movies, will they play back in High Sierra? Has anybody tested this yet?

    I'm running a 4K monitor with Radeon RX 560.
  7. EugW macrumors 601


    Jun 18, 2017
    Google does not support HEVC or 4K delivery in YouTube for Safari. It's a maximum of 1440p, but with h.264.

    Chrome has 4K support, but it's VP9 only. Apple and Chrome do not support hardware VP9 decode (even though the latest CPUs in macs support hardware VP9 decode).
  8. Cougarcat macrumors 604

    Sep 19, 2003
    Internal? What do you have, a Mac Pro? Because of UHD's draconian DRM you need Kaby Lake or better and a HDCP 2.2 compliant monitor.
  9. Riwam macrumors 6502a


    Jan 7, 2014
    Basel, Switzerland
    Charming! (regardless of the "K")

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