File Extension HEX File Format Macintosh BinHex 2.0 file HEX stands for Macintosh BinHex 2.0 file. This was last updated in March 2012 By Margaret Rouse Browse File Extensions Alphabetically: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # Ask a Question. Find an Answer. Ask your peers a question about this file extension. Ask a Question Tips for migrating from Windows to Mac On the ninth day of Christmas my true love gave to me... a Buffalo MiniStation Air How can I do DTP work at Macintosh?