DivX now has HEVC-H.265 for Mac...
I found this yesterday....
http://www.divx.com/en/software/hevc-plugin
Here's a YouTube tutorial video :
https://www.youtube.com/watch?v=mYyIkoGMtNU
It used all of my cores... A 10 minutes 1080p will take about 10 minutes to encode. Setting a 1080p to encode at 4000 kbps, the quality is amazing. (A 1080p video should be set at the default 8150 kbps.) Small videos sizes (720p) encode very fast (almost real time). Encoding a DVD (2 hours) to h.265 might fit on a CD. You can also use the VLC player to playback the videos if you wish too.
I'm amazed so far!!!
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iMac, OS X Mavericks (10.9), 27" 3.4GHz Quad-Core i7-SSD-2 GB HD