The feature, present in macOS 10.4 to 10.10, offered two options: “Zero Out Data” and “7-Pass Erase”. To reduce the chances of deleted files being recoverable, Apple included a feature called Secure Erase in Disk Utility. If you want to delete a file forever, you will need to make sure it is overwritten immediately, since a simple “Empty Trash” command will only mark that part of the disk where the file was stored as available. And it’s true, you should definitely take care when securely deleting data from an SSD. Apple recommends using FileVault instead, which uses encryption to protect your data. With macOS 10.11 El Capitan Apple removed the “Secure Erase” and “Erasing Free Space” features from Disk Utility, saying that they were not needed for a the solid-state drives that are standard in modern Macs because a standard erase makes it difficult to recover data from an SSD.
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