OJBs Web Site: Tip

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(Up to OJB's Mac Tips List Page)

Secure Erase SSD

To secure erase an SSD (Ensure its contents cannot be recovered)

The usual secure erase isn't available in Disk Utility.
The old technique is not recommended for SSDs.
Alternative is to decrypt, then re-encrypt the whole drive.

Go to Settings > Security and Privacy > Turn off Filevault
Wait for a long time while the drive is decrypted
Re-enable Filevault and set a new key
Wait for along time again while the drive re-encrypts