The Palm Desktop application must be installed and the handheld HotSync’ed successfully prior to installing Data Pro.

You may find the Palm Desktop for Macintosh on the CD that is packaged with your Palm handheld. Or you may download the Palm Desktop for Mac from the PalmOne website. Take care in selecting the appropriate Desktop version for your Mac OS before you download it.

http://www.palmone.com/us/support/macintosh/mac_desktop.html