Hey all, I recently tried to wipe my old but well working macbook (black version) in order to give it to a family friend in need. I cannot find the original install disk that came with the computer so I followed the instructions on this link http://support.apple.com/kb/HT5943 which showed me how to erase the hard drive to pass it onto a new owner. I did that and now on startup it shows a folder with a question mark on it and wont boot. Upon further investigation the hard drive does not show up in the startup up disk options which I think is the cause for the question mark. Does anyone know how to help without the grey install disk? The only disk I can find is the snow leopard upgrade disk which tries to install but cannot complete for some reason.Thanks for the help!! Forgot to mention- I ran repair disk and the report says the hard drive appears fine which I believe because the computer was operating just fine prior to the erase just a little slow as old computers get.