There are two ways to make a cable so that you can use the ActiveHome interface with your Macintosh. If you already have the cable that connects ActiveHome to a PC, you may wish to use it. This will require building a DB9 to MiniDIN-8 cable. Your other alternative is to build a cable that connects directly between the ActiveHome and your Macintosh. This will require building a RJ11 to MiniDIN-8 cable.
Detailed diagrams are available.