We originally looked at the changes High Sierra brought to performing a secure wipe. It may be a good idea to review how Disk Utility can be used to erase and protect information in the article: How to Securely Wipe the Data Stored on a Drive in macOS High Sierra. Which brings us to the question: Can you securely erase an SSD without damaging the drive, and make sure that all of the information is no longer recoverable? (Disk Utility’s Security Options for erasing a drive may not be present when used on an SSD.) To make matters worse, at least from a security standpoint, even after overwriting data on an SSD, it’s possible that some of the original information is still present on the drive. SSDs, on the other hand, can be affected poorly by the same techniques used on hard drives: overwriting data locations multiple times with random data or specific data patterns. The process of securely wiping a drive, that is, removing every bit of the data it contains and scrambling its content enough to protect the information stored on the drive from prying eyes, is fairly well understood for old-fashioned spinning hard drives.
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