SSD Security Options

Wiping a SSD is not like doing it to a HDD. In fact it doesn't really matter how many passes you do on a SSD, it never really gets wiped.

I am at loss myself when it comes to reselling. It still would take equipment most people don't possess to lift and reconstruct your data but still...

Must turn ON FileVault when you boot it for the first time.

 

A 7-pass would be completely idiotic on an SSD. It is on modern HDDs too which are unrecoverable after a single cycle. It was theoretical possibility on old HDD with much bigger bits but today a single earse is all you need.
Since NAND works differently you'd just need one and there is not even a theoretical chance for recovery. But you need to write over everything because you cannot secure erase single files.

On an HDD if you just format you can recover files via special software. On an SSD you cannot after a single Trim. The only way is unsoldering the NAND and attaching them to some special controller that reads out all that is left and somehow makes sense of it, which is can be quite tricky depending on how many random writes occured. No normal person can do that.

Just for selling trimming the disk is all you need to do. If you want to be safe from the NSA. Fill the drive with garbage and delete everything. Fill the last 10% a couple times to write over the spare area if your SSD has any significant amount of it.

 

You don't need to wipe an ssd. If you were to repartition it the data would be unobtainable to most people. To get at it you would have to physically dismantle the drive as in remove the chips and read them.