Facetime already uses h.265 on the latest iPhones.Doesn't support it - I'd say that if there is a support it might not be until maybe next year with a Apple TV refresh with 4K support.
VLC and Creative Suite support it anyway
Edit: I tested VLC. Support is not good at the moment and I'm pretty sure there is no GPU hardware decode/encode on the Mac at the moment.
Clarification, the Early 2015 13" (and iMac 21") running Broadwell does support 8 bit HEVC through hybrid hardware and software decoding. Hoping Sierra will implement the new drivers Intel released to allow better 4K and HEVC playback.I believe that the the decode/encode for these standard formats is dependent on the CPU, although it is possible for the GPU to help out. None of the current Intel CPU's in macbooks support HEVC, all newer Intel CPU support hardware decoding of HEVC though.
A software solution is still possible though. But it hits pretty hard
In case people are going to use the mentioned app, be sure to read the agreements when they pop up as the developer has bundled with adware/malware in order to monetize (I know MacKeeper and zipcloud are a few of them). People who have installed it and are unaware might need to use malwarebytes to check.MplayerX can do the job very well, and usually doing better job then VLC in H265 and 4K. I use that in 10.11 for my 4K video, haven't test it on 10.12 yet.
Clarification, the Early 2015 13" (and iMac 21") running Broadwell does support 8 bit HEVC through hybrid hardware and software decoding. Hoping Sierra will implement the new drivers Intel released to allow better 4K and HEVC playback.
The 27" iMac running Skylake fully support HEVC hardware wise though not too sure if 10 bit is fully supported.
Is it the 2014 model? I think it should be able to decode HEVC software wise fairly well even if the CPU may be quite high. My 2009 Macbook Pro was able to decode 1080p HEVC (Game of Thrones, should be 10 bit) though some intensive fighting scenes and the introduction did see slowdowns. CPU use was pinged between 85~99% and using mpv.io.Thanks! I always forget about everything other than the Macbooks xD
My Mac Mini with i5 Dual, struggles very hard streaming HEVC.