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Deleting hidden files that take up space?

4118 Views 2 Replies Latest reply: Jul 9, 2012 11:29 AM by ds store RSS
ureshii Level 1 Level 1 (0 points)
Currently Being Moderated
Jul 9, 2012 9:17 AM

Hello,

I just learned about emptying trash securly in my Macbook Pro and that's how I plan to trash all my items from now on.  The thing is though, up until now everything was deleted normally and I have no clue which of the hidden files that I am seeing are useless for me to delete for good.  There are a lot of them and I would like to know  if there is a guide for this sort of thing so I know which ones are from my previously deleted pictures, videos, etc.

Thank you

MacBook Pro (15-inch Early 2008), Mac OS X (10.6.8)
  • sig Level 8 Level 8 (35,770 points)
    Currently Being Moderated
    Jul 9, 2012 10:43 AM (in response to ureshii)

    Don't knock yourself out. Deleting the Trash normally is fine.

  • ds store Level 7 Level 7 (30,305 points)
    Currently Being Moderated
    Jul 9, 2012 11:29 AM (in response to ureshii)

    There are two kinds of hidden files, one OS X uses to store info it needs without a user deleting them, this you don't want to do obviously.

     

    However for privacy reasons there are cache files you can delete, use the #12 OnyX routine here for that.

     

    Step by Step to fix your Mac

     

     

     

    Also according to what your describing you have been Emptying Trash, thus the files are still on the hard drive waiting to be overwritten with new data.

     

    Now you realize that and want to "scrub" the free space on the hard drive, so after you use OnyX and reboot, then you use Disk Utility > Erase Free Space option (Zero erase or 7x overwrite) on your Macintosh HD partition. Takes awhile (7x even longer) because all available free space is addressed to secure erase)

     

    You can read more about it here

     

    How do I securely delete data from the machine?

     

     

    You only need to Secure Empty Trash on files you don't want to ever be recovered from a hard drive, if you set it all the time, it gets to be a pain as it takes so long as it's using the 7x overwrite function.

     

     

    If you have a SSD, you can't delete or scrub the drive, as you will read in the last link.

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