Tiger's iCal contains a plugin for the 9300i. It works for the 9500. Simply find the plugin and change _every_ instance of "9300i" with "9500" and it'll work. So the whole bundle must have "9500" in its name, and some ".plist" files inside the bundle must have "9500" wherever it previously stated "9300i". Also the icon file for the 9300i must also be renamed.
After you've done that, remove any trace of your 9500 ever having been paired with your computer. Both on the 9500 and the computer. Then reboot both the computer and the 9500 (just for safety's sake).
Then pair them again, and iSync should simply work.
Mac user since 1987. Running Mac OS X 10.8 Mountain Lion on a MacBook Air 11" & an iMac 27" and whatever's newest for my iPhone 4s, iPad 3 and AppleTV 2.
Apple Certified System Administrator 10.6, Apple Sales Professional 2008-2011, Apple Certified Mac Technician.