I went to that place with my original 10.5.1 that came with my Mac Pro and their new Mac Pro refused to startup with the CD. I came home with their empty drive which I placed internally and installed 10.5.1 then a 1.65 GB upgrade at sometimes 1 MB/sec from Apple. Tomorrow I place this drive in their Mac and we'll see. Paul Moortgat On 10 Feb 2010, at 01:23, Neil Laubenthal wrote: > A particular model usually won't boot from anything older than what > it shipped with. > > > 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. > > > ----------------------------------------------- > There are only three kinds of stress; your basic nuclear stress, > cooking stress, and A$$hole stress. The key to their relationship is > Jello. > > neil