My daughter's Macbook (1.83GHz Core Duo 2GB RAM, 60GB) hard drive bit the dust. I installed a new 320 GB internal hard drive. Her CDRW drive is non-functioning and so she has an external CD/DVD drive which connects via USB. Her laptop was purchased used and came with no install discs but likely was OS 10.4. I have install discs for OS 10.5.2 for a Macbook. I booted up the computer from the install disk, formatted the new internal hard drive as Mac OS Extended (Journaled) with a GUID partition scheme. I am now trying to install an operating system onto this new internal hard drive, however when I boot up with the installer disk and choose "English" as the language, the dialogue box "Preparing installation" appears for a few seconds and then I get the dialogue box that says "Mac OS X cannot be installed on this computer". Underneath that it says "This software cannot be installed on this computer". There are only 2 buttons to click on below that "OK" and "Restart". Why am I not able to install the operating system? Is there any solution or workaround? If anyone can offer some help, that would be fantastic. Thanks!