4K & macOS high Sierra

zaxven

macrumors member
Original poster
Sep 18, 2014
63
17
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.
 

zaxven

macrumors member
Original poster
Sep 18, 2014
63
17
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.
 

yellowscreen

macrumors regular
Nov 11, 2015
204
79
i presume you have non retina iMac? could you try 4k 60fps youtube? or 1440p 60fps? thank you
 

redheeler

macrumors 604
Oct 17, 2014
7,398
6,965
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.
Huh?
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)
 

eyeangle

macrumors regular
Jan 2, 2014
149
19
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.
 

EugW

macrumors 604
Jun 18, 2017
7,300
4,686
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).
 

Cougarcat

macrumors 604
Sep 19, 2003
7,766
2,545
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.
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.