These files have been compressed and encoded to protect it from electronic corruption on the Internet and must be expanded/decoded with Allume Systems' "Stuffit Expander" (freeware). This application can be downloaded at no charge from Allume's website at www.allume.com/mac/index.html.
MACINTOSH OS X (Demo/Update)
Step 1: Download MTGX20s.dmg.bin (6.512384 MB) . NOTE: Version 2.0e and later significantly expand the MTG class file structure, so you must upgrade ALL copies of the program you use.
Step 2: Expand/decode the file with "Stuffit Expander."