I have recently acquired a 2nd hand Macbook (2010 Unibody) and decided to perform a clean install of Snow Leopard so that I could upgrade to Lion via the App Store.
I have borrowed a retail disk of OS X SL from a friend and have successfully performed a clean install and upon first boot up I have noticed that the audio isn't working. Checked Sound under System Preferences and It seems that I don't have a correctly installed driver for my audio device as it is grayed out.
A quick google search revealed this:
What do I do now? I only have a Retail disk of SL and don't have the original Installer disks that came with the Macbook.