Earlier today Apple supposedly (TUAW reports it, and so does Apple’s Software Update XML) sent out a MobileMe Support Update for Mac OS X 10.5.4 users. This update adds the MobileMe prefpane to System Preferences and switches all the “.Mac” placeholders in the NIBs of Apple applications from saying “.Mac” to saying “MobileMe”. After this update has been applied to your Mac, you’ve quite completely killed off .Mac and enabled full support for MobileMe on your system. To get this update if it’s not showing up in Software Update click here for the Software Update download to begin from your web browser. Enjoy, Alex.