I have a Mac mini "Core 2 Duo" 2.4 (Mid-2010) running OS X 10.10.2 that was given to me by a coworker and I want to give it to someone who has a particular desire for this older system. I need to wipe ...

Here's the thrilling conclusion to last week's episode, namely, how to properly reformat — erase — your old Mac's hard disk so its data can never be recovered. First, back up the data on your old Mac ...