Apple OS/X Hex Editor

If you need a hex editor in OS/X to see exactly what is in a file, download this free one.

• http://ridiculousfish.com/hexfiend/

Two other Unix commands for working with binary data are dd and od. You can read about them from their man pages.

• x-man-page://dd or man dd
• x-man-page://od or man od

Taken from email by Jose Hales-Garcia to OS/X Forum List.