Hi! I'm new to the forums, and I had a question about the Reversion Single Player Map. I attempted to download it, but none of the files were able to be used by my Mac. Is there a Mac version of this map on the forums? Thanks.

1) There are no Mac versions.
2) Search First,
There are many posts about this:

mapping-help/playing-portal-2-custom-maps-t4076.html
3) You should post this in the map's topic.