I will try the 10.5 that came with my Mac Pro. Now the 10.6 drive is removed, there's no drive with a system anymore. It's somebody else his Mac. On my Mac when I format a second internal drive in Guid and I look at the System Profiler, it's no GUID. How can that be? Paul Moortgat On 09 Feb 2010, at 18:45, Jeff Carruthers wrote: > > On Feb 9, 2010, at 11:59 AM, Paul Moortgat wrote: > >> On a new Mac Pro one need 10.5 instead of 10.6. I called Apple >> because 10.5 would not install. They told me that was because 10.6 >> was already installed. >> I argued that I started with a DVD. The mac will see the 10.5 and >> will not proceed was the answer. I removed the drive with 10.6 and >> it still didn't worked. >> Can that 10.5 DVD be damaged while I can use it on a Powerbook? >> The 10.5 is a retail version I bought for 160 euro from Apple. >> One need Appletalk for printers and it's not on 10.6. >> >> Paul Moortgat >> > > > Paul: I believe Apple's OS disks will often only work for the > machines that were current at the time the CD or DVD was issued. > > You might try making a clone of the Powerbook internal hard drive to > a firewire external drive and then see if this will boot the MacPro. > Be sure to use a GUID partition on the drive you will be using to > make the clone, otherwise it won't boot on a MacIntel system. > > I assume that the Powerbook is a MacIntel; if it's a PowerPC > machine, then the idea won't work. > > Cheers > > Jeff > ----------------------------------------------- > Carruthers Communications Tel: 613-278-0390 > 678 2nd Concession N Sherbrooke Cell: 613-720-2350 > R.R. 1, McDonalds Corners, ON K0G 1M0 Fax: 613-278-2929 > www.carruthers.com e-mail: > jeff at carruthers.com > > "There's no such thing as a dumb question." (Anon)