DropDMG is a universal binary that runs natively on both PowerPC- and Intel-based Macs using Mac OS X 10.3–10.5.
If StuffIt Expander 9.0.1 or later is installed, DropDMG will be able to convert StuffIt archives to other formats. It is recommended that you turn off the StuffIt Expander preference Continue to expand (if possible).
If StuffIt Deluxe 7.0 or later (9.0.1 recommended) is installed, DropDMG will be able to convert disk images and other kinds of archives to StuffIt X format. In addition, StuffIt Deluxe allows DropDMG to convert more than one StuffIt archive at a time and to convert StuffIt archives without opening the StuffIt Expander application. Recent versions of StuffIt Deluxe automatically install the command-line stuff and unstuff tools that DropDMG requires; with older versions, you will need to install these tools separately.