Sold my 24" iMac and want to clean it up and delete everything...what do I need to do? Many thanks...please email me....ricfel13@gmail.com
2nd way the fast way create a new user account , give that new user account full admin rights then log in as this new user and delete your own old account , downside the new owner will not see the welcome screen
http://guides.macrumors.com/Clean_Install_of_OS_X_10.6_Snow_Leopard
Perform a clean install of OS X but while using the Disk Utility, remember to select Security options because you want to erase EVERYTHING from the HD, otherwise the data will be recoverable. I would do a 7-pass erase, but it will take more time.