Hi Guys, A little help if anyone can!? I recently had to upgrade the graphics card in my Mac Pro, however it won't boot up because the OS isn't update which is what is required. I have a G5 which I have put the MacPro hard drive into so that I could boot it up, update the software and put it back in the MacPro. The G5 recognises the hard drive when it is acting as a 2nd Hard drive to the G5's original but it doesn't show it as a startup option. I have tried having just the MacPro drive in the G5 without the original hardrive but then it doesn't boot at all. Both are running 10.5 and I can't understand it won't find it. I have tried it the other way around, the G5 hard drive in the MacPro and it works fine and when I put the MacPro hard drive in as second Hard Drive it shows up as an option for startup but doesn't work as it isn't uptodate. ANY help would be appreciated !!!