OK, I tried to install Bootcamp (XP Pro SP3) on my Mac Pro (2.66GHz....) and it was not playing nicely. I have OSX on one HD and I wanted to install XP on a 2nd internal HD. Everything started OK but the installation of XP just gave up on me so I decided to go back into OSX and start again. No joy. Now when I boot my Mac Pro I got the 'bong' but nothing happens. I have tried removing the HD that had XP on, still no joy. I tried booting off the OSX DVD, no joy. My guess is that XP has screwed something on the boot loader (or whatever it uses). Is there anyway of doing a hard reset of that to get OSX back? Thanks. EDIT: Just tried resetting the PRAM, still no joy, bugger!