I am a Windows guy and I dont know much about MAC, but I saw that there a was MAC support for MAC. I dont understand if you build the MAC installer on Windows or on MAC OSx? Because tere is differat OS environment...
Please keep in mind that Advanced Installer software can be installed only on Windows machines. So, the MAC OS X packages created using Advanced Installer are built on Windows systems.
Here's the "Mac OS X package" article that clarifies the MAC OS feature. You can actually build MAC installers for java applications but as my colleague Daniel mentioned you cannot use Advanced Installer on MAC.