Hi,

A friend offered me to update my Mac OS to 10.5

What he has is a "disk image" of Mac OS X 10.5 and
not a DVD with the information in it. When he
double clicks on the disk image to install it, the
computer reinitiates. However, when the computer
reinitiates, it doesn't find the "phisical disk"
with the OS X that it would have normally found and
therefore it can not complete the process.

Thank you very much in advance for your time and
kind attention to this matter. (If my question
is some somewhat out of order, please let me know).

Kind regards,

igmolinav.

if its am iso you can go into disk utility and burn it onto a DVD but if its a DMG i dont know of a way for it to work