I am selling this 5 year old Mac through online. But before that, I am looking to wipe all its data to an extent where it is unrecoverable. The only question is how should I make sure if my Mac is wiped beyond recovery.
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Disk utility overwrites the sectors of the hard disk drives using 0s and 1s. 3 Passes indicates that disk utility will overwrite the location with binary numbers in three times. Similarly 7 passes overwrites the location seven times. All these efforts are made to make sure that no data is …
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