My Kaby Lake MacBook should arrive tomorrow. Yay! My Kaby Lake iMac should arrive next week or so. Just for fun I want to test playback of some of those higher bitrate 10-bit h.265 HEVC videos. Hardware HEVC and VP9 support, and 4K DRM support, is why I waited for Kaby Lake after all. (I waited 8 years to update my laptop, and 7 years to update my desktop.) Is there any Mac software available that does proper hardware acceleration for h.265 HEVC video (mkv or mp4) that I can use on 10.12 Sierra? Or must I use 10.13 High Sierra in order to have any access to hardware h.265 decoding? If the latter, I suppose one thing I could do though is install the High Sierra beta on an external USB 3 drive and boot off that to test HEVC MP4 files (if I can find ones that are compatible with QuickTime). However, that doesn't help me for existing h.265 files I would want to play outside of just basic testing. I don't want to switch to 10.13 High Sierra on my machines until it's at least very close to release. BTW, what video files to test? I do note this page does have some mp4 files with 10-bit UHD 2160p HEVC video, but I wouldn't know if they are fully compatible with QuickTime or not. http://www.4ktv.de/testvideos/ Also, what about VP9? If I use the Chrome browser for YouTube 4K, would VP9 be hardware accelerated in either 10.12 Sierra or 10.13 High Sierra?