For anyone else who's interested, this thread over at Mac Rumors describes how to add Moto W490 support to iSync:
http://forums.macrumors.com/showthread.php?p=4431751
Remember to delete the phone from the Bluetooth device list, then make the changes to the plugin (within the iSync application):
iSync -> (show package contents) -> Contents -> Plugins -> ApplePhoneConduit.syncdevice -> Contents -> Plugins -> PhoneModelsSync.phoneplugin -> Contents -> Resources -> MetaClasses.plist
Edit this with TextEdit and past in the following after the first <dict> statement:
<key>com.motorola.W490</key>
<dict>
<key>Identification</key>
<dict>
<key>com.apple.gmi+cgmm</key>
<array>
<string>"Motorola CE, Copyright 2000"+W490</string>
</array>
<key>com.apple.gmi+gmm</key>
<array>
<string>"Motorola CE, Copyright 2000"+W490</string>
</array>
</dict>
<key>InheritsFrom</key>
<array>
<string>com.motorola.usb-bt.0x22B8/0x4902</string>
</array>
<key>Services</key>
<array>
<dict>
<key>ServiceName</key>
<string>com.apple.model</string>
<key>ServiceProperties</key>
<dict>
<key>ModelName</key>
<string>W490</string>
<key>PhoneIcon</key>
<string>MOTW490.tiff</string>
</dict>
</dict>
<dict>
<key>ServiceName</key>
<string>com.apple.synchro</string>
<key>ServiceProperties</key>
<dict>
<key>stringEncoding</key>
<string>UCS2</string>
</dict>
</dict>
</array>
</dict>
If you want the right icon to display, you can get the TIFF file from the above thread and move it to the same directory as the MetaClasses.plist file resides in.
Add the Bluetooth phone via Set up Bluetooth Device and you should be go...
-Frank