Sorry I thought that I should have added more details. I wasn't sure because of the codecs, and which media player(s) had a the better video playback. I've tried using Plex on Mac, but what I don't like about it is that it feels a little bulky, and you can't fast forward or rewind the amount of time you choose.
I really like the rendering with dxva and the low cpu utilization under windows 7. To get hardware acceleration to work I bootcamp into win7 and then can view 1080p mkv & blu-ray (no hd audio bitstreaming though currently, just plain dolby digital/dts).