I used ucf.jar to do the packaging on Windows for both Win and Mac, including CS6, CC 32/64bit and CC2014 32/64bit. You can find a detail description about it from Adobe Exchange.
Following is a sample of productions definition in my mxi file.
<products> <product version="8.0" primary="true" name="InDesign"/> <product version="9.0" primary="true" name="InDesign"/> <product version="9.0" primary="true" name="InDesign32"/> <product version="9.0" primary="true" name="InDesign64"/> <product version="10.0" primary="true" name="InDesign"/> <product version="10.0" primary="true" name="InDesign32"/> <product version="10.0" primary="true" name="InDesign64"/> </products> <files> <file source="./mac_cs6/Sample.InDesignPlugin" destination="$indesign/Plug-Ins/Sample/" platform="mac" minVersion="8.0" maxVersion="8.9" products="InDesign"/> </files>
Regards,
Eric