Mac os x cannot start up from this disk
I have a 2008 MacBook Air which runs Leopard. I want to upgrade to Snow Leopard and then Lion. I have the Snow Leopard family pack disk and try to do the install but it say 'Mac OS X cannot start up from this disk' and shows a yellow triangle with a !
I went to the genius bar and they told me to put the Snow Leopard disk in the superdrive and restart holding down C and it would then work - but it did not. I also saw on a forum about using disk utility and partion and resizing the partition then putting it back as it was originally and then re trying but I get the same message.
Anybody got any ideas?
iMac 27" 3.2GHz Core intel i3, Mac OS X (10.6.5), MacBook Pro, MacBook Air, MacBook (all 10.6.1), iMac G5 (10.4.11