Can somebody please advise me on how to update Leopard to the latest version (10.5.2)? I've gone to the Software Update application and searched for the update, and then clicked install. Once it's downloaded, I am required to restart my MBA, and it then obviously goes to the screen where it shows the installation progress for the update. ...However, the progress bar stops quite early and doesn't move any further, and indicates that it is "configuring installation" but doesn't go any further than that. I've left it for up to 20 minutes, and there's no joy. So I have to restart my computer by holding down the power button. In the words of Marvin Gaye, what's going on?