currently operating Intel Core Duo how can I upgrade
Do I have to take the computer to Apple as I am unable to download from the app store... at least with my limited knowledge... or will I need to upgrade the whole computer?
MacBook
Welcome to the Apple Support Communities
Go to > About this Mac and copy Version. If the version is 10.6, open > Software Update and install the most recent version because you can't upgrade to a newer Mac OS X. If it's 10.4 or 10.5, buy Snow Leopard > http://store.apple.com/us/product/MC573/mac-os-x-106-snow-leopard Then, make a backup, insert the DVD and upgrade