I have an iMac G4 1.25Ghz with 2GB ram. Since the iMac G4 doesn't support USB boot and it can't read DL DVD I can't install Leopard 10.5 Retail DVD directly. So I removed the internal HDD and put in an external enclosure and I am trying to use the imac (intel i5) I have at work to partition it and doing a clean install on it. The steps I'm taking are using Disk Utility (Lion OSX) 1. Partition the external HDD into two parts. 10GB (Apple Partition Map) and the rest are free space formatted as Mac Extended Journaled. 2.I load the Leopard DVD and mount it to Disk Utilty. 3. I go to restore, chose the 10GB partition as the destination and the DVD as the source. Takes a while while it transfers the files and everything finishes successfully. 4. To test it out I restart the iMac i5 to boot from the external drive and I keep getting this error message: I have tried both Apple Partition Map and GUID partition scheme. Both give me the same error. Should I be able to install OSX to the free partition space using the Imac i5? The reason I want to pre-install the OSX is because the iMac flat panel is not fun to remove and reinstall the internals. There for I wanna make sure its done correctly before I put everything back in.