it should be able to be "seen" by some 3rd party utilities such as Drive Genius.įind an old copy of Drive Genius, which has a "shred" option that should zero out the drive. With the drive in the enclosure and connected to another Mac, see if it will erase to HFS+ (Mac OS extended with journaling enabled, GUID partition format). IF DISK UTILITY WON'T ZERO THE DRIVE, you could try this: Restore the OS (Internet Recovery comes to mind), restore data. Then, put the drive back into the laptop. If it does, choose that and ZERO OUT the entire drive. take the drive out of the MBP and put it into the enclosure.ĭoes disk utility offer a "secure erase" option? (it may or may not). If so, see if an external enclosure is available (try OWC). If you want that drive erased completely, I would suggest this:
I assume however, since you also mention "any snooper" that you were simply trying to set a high bar for knowledge and resources. Privacy is important but is undermined when it is used in malicious ways and this gives justification to attempts to create anti-encryption legislation. You should neither attempt to break or circumvent the law. Privacy is an important human right But if there's a warrant or justification for law enforcement to seek out your data, purposefully getting rid of it to hide something is, at least in the regions I am familiar with, itself a crime.
I also want to note that you specify law enforcement. Deleting local data won't influence that. If one made use of services like DropBox, Microsoft OneDrive or other online data storage All bets are off. That only accounts for data stored locally however. If it is only performed once it may be possible to get some data back by looking at the relative magnitudes of magnetism on the platter still in some cases.įor SSDs with TRIM enabled this is less of a concern and it generally won't take very long at all using the device before all the data blocks previously storing the data being moved around the drive to optimise its performance levels anyway.ĭata extraction is also a very timely process, as can it be to fully delete large blocks on spinning hard drives which is generally why we just mark the data as free and deal with it later in the first place. Disk Utility has "Secure erasing" options that will allow you to specify that the entire data section should be written to all 0s or overwritten with random data and even for this process to be performed several times.
Mark the data as free and just overwrite it when something else tries to use it. On a rotating hard drive this will most frequently be done in a way that does not actually reset the bits that store the data, since that is an unnecessary and time consuming process. Data actually stored on your machine will be removed from the partition table and can thus be reclaimed for use by other things and will be considered "free" space.
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