A friend (really, it WAS a friend!) recently fell for a scam wherein a popup appeared on their screen claiming to be from Apple and advised them call a phone number for assistance with an urgent issue with their Mac They did, and granted remote access to their system to whatever shady scammer was on the other end of the line. Eventually they figured out something was up and disconnected from the internet. So now, I'm tasked with fixing this mess. If it was a spinning HD, I'd be fine... but they have an SSD as their boot drive, and I'm less familiar with security on SSDs. What's the best approach to securely zeroing everything when an SSD is involved (and how long might it take to perform the operation on a 256GB volume?