From Ledet Training Wiki
LiveCycle Designer is form design software by Adobe. It is bundled with Adobe Acrobat. It creates PDF forms of the .XFA variety. .XFA based PDF files are really PDF in name only. Internally, they have a completely different structure and many Acrobat features such as layers and PDF optimization are disabled for PDF files created from LiveCycle Designer. Livecycle Designer created forms do not work well with Apple Macintosh OS X in Safari or Preview.