Hi guys, I've never seen anything like this before and I couldn't find the description of this problem, so hope someone knows what to do. We have a MacPro in the office, and it wasn't used for some time now. Today I was trying to install iWorks '08 on it, and of course the system requested an upgrade, so it installed new Quicktime, but for some reason couldn't install Mac OS X upgrade (I think to 10.4.11), but I restarted it anyway. But now I can't start the Mac - all I get is the desktop with grey box with progress bar on it. The bar is at zero, and doesn't move, but I can move the mouse, so it's not frozen. I tried to restart it several times - same result. I tried to start it up in safe more (holding Shift key) - same result. Can anyone suggest anything? I need the Mac quite urgently - need to do a nice presentation for work.