It works smoothly
From time to time, South Koreans send me "hwp" format documents, and its just very difficult to work with it. This is a strict viewer, in the sense that it doesnt even allow filling in forms or any other editing, but at least I can read and search on the document. But still when I have to modify the content, I have to find a windows machine somewhere and thats such a pain.
I had a version that worked on snow leopard, and this one works flawlessly in mountain lion.
DoubleHelicat about 한컴오피스 한글 Viewer