Im in the process of returning one laptop to Apple and selling another on eBay and i felt to create a list, as i go, of steps that could be taken to ensure there is zero to minimal personal history left on the laptop. This seems to have been a bi-yearly event for me! This is the beginnings of a guide to thoroughly 'clean' a laptop that you no longer need and are planning to release back into the wild! I appreciate some people might consider some of the actions 'extreme' (maybe?) whilst others will chose to add or refine steps that have been included, or suggest further steps that may be unnecessary for most. So additions & modifications are welcome. Maybe someone could bring together a well structured step-by-step guide from the information gathered. Maybe one already exists? What ive done so far * backup all important information to external drive or new laptop * deauthorized the apple itunes account. * signed out of mobileme account in system preferences * sign out of all similiar accounts. * reset all private info from web browsers * clear all browser cache / reset web browsers * secure delete all personal files/documents anywhere on drive * secure delete iphoto & itunes libraries * secure delete anything with a personal reference * secure delete all 'relevant' application support folders * secure delete all mail / email folders * secure delete ical data file * secure delete address book file * secure delete all preferences files & similiar files * secure delete keychain login * Create another user account under generic name with admin priviledges then delete the previously used user account. * From newly created generic admin account use disk utility to secure erasure free space on drive with whatever level of security / number of passes you feel comfortable with. * Finally, clean install of Mac OSX using install CDs * Could zero out free drive space one more time? Have i missed anything?