Snow leopard will not install
I have an old mac Book with OS X 10.5.8 running on it and I have a family DVD version of leopard that I have installed on my imac( that currently runs Lion(10.7.2) so it should install in my mac book. When I insert it into the macbook it whizzes for a bit and then spits out the dvd. I need to update this mac book so that I can run icloud etc on this machine to keep up with all my appointments etc ( I did check that it has an intel processor as required for lion)
Any ideas?
MacBook, Mac OS X (10.5.8)