The 2.4.8 Beta version includes improved support for Mac OS X computers
Notable improvements and bugfixes: --Add support for Mac OS X: -Modify the Connections script to copy the _mmDbScripts folder itself; -Export ConnectionName parameter from Connection_include.edml; -Correct an ADOdb connection related bug. --Logout Server Behavior works with register_globals = off; --Correct an addReplaceParam bug.
To be able to literally work on MACs with Dreamweaver MX, you should also install the InterAKT MAC Patch (see more about it at http://www.interakt.ro/products/bbs/view.php?prodId=0&id_brd=4316).
See more on PHAkt 2.4.8 at http://www.interakt.ro/products/PHAkt/