It's available for both Mac and PC...but Windows users especially will appreciate this really robust media player from the one, the only...FTrack! It caches frames, you can drag N drop EXR sequences into it and play simply as a video file, and several other video features (like separating channels, doing A/B comparisons on frames, etc).
This is a standalone version of the media player engine that's embedded in their FTrack review platform (similar to Frame .io)
, should should go under "Start here"? or maybe "Tools of the Wizard"?