So, I already have StuffIt Expander 12, but I have recently acquired what I have researched to be files compressed using a "Parity Archive Tool" and I was wondering if there was any way I could decompress/unarchive these files. I looked at StuffIt's website and it does not show the Parity archive files as compatible with it. I also could be completely mistaken as to what exactly these files are. I looked here: http://filext.com/file-extension/PAR2 for what they do, but I don't really understand it. Could someone help me figure out what the files are/what they do and how to use them on my mac?