Specific scenario: Selling Mac with Fusion drive
Hardware:
Self Built "Fusion" drive (256GB SSD, 2TB HDD)
MacMini (2012)
So the first thing I did was boot into Recovery Mode and use Disk Utility to erase the main volume. The problem is that I don't remember if I had File Vault enabled. This was my main computer, so there is a lot of personal information on the drive that want securely erased.
I have since gone back and reinstalled the OS with a new fake user and enabled File Vault. I then went back to Recovery and erased the Fusion drive (deleted the Volume), and reinstalled MacOS.
My question: is this sufficient to securely erase any existing data on the drive? I have concerns about recoverable data still in existence on the HDD.