So what options do we really have to protect ourselves when we plan to sell our old rMBP's that have the new flash storage/SSD? Apple makes the security options "greyed out" in disk utility so you can't readily do a 7-pass secure erase any longer. I know there's a work around by formatting the drive and making it encrypted, which then allows for the normal security options. However, how much damage are we really doing to the flash storage with a 7-pass secure wipe. Is this a case of taking a chance your personal information will be stolen, or severely damaging the life of the drive? I saw a thread on here posted where a guy was worried about even doing a simple disk erase in disk utility simply because he believes the drive performance will suffer. Your thoughts?