At 12:51 PM +0100, 1/30/08, Paul Moortgat wrote: (APM is the pre Intel style of fomat. GUID is the Intel style of formatting a disk. These are buried options in Disk Utility's Erase capability.) How is the internal formatted? (GUID or APM?) 1. OS X won't install on an APM drive if you try the install from an Intel Mac. 2. OS X won't install on a GUID drive if you try to install from a PPC Mac. 3. OS X won't boot on an PPC Mac from a GUID drive. 4. You can boot either a PPC or an Intel Mac from an APM drive (keeping in mind 1 and 2), so you have to install from a PPC Mac to get an APM volume that could boot both. And, you need to have an OS X version on that partition that would be acceptable on both PPC and Intel, of course. -- <><><><><><><><><><><><><><><><><><> Robert Ameeti You can never underestimate the stupidity of the general public. -- Scott Adams, The Dilbert Future <><><><><><><><><><><><><><><><><><>