How can I tell that my disk was deleted?
I’ve erased a disk from my MacBook Pro (or so I think), because it is not functioning probably needs a new hard drive which I don’t want to deal with, and I am now selling it. It’s been erasing for the last 12-14 hours (I chose the high security method), and now appears to be done. How can I be sure it’s been erased? It was called 500.11 GB APPLE HDD etc. And is it ok that the Mac OS X base system and that disk is still on there? I can’t delete that one so I think it must be the operating system that the person has to have on there to use it. Right? How do I know that I did this correctly and the person I’m selling it to can’t get my personal info?