File Vault

Discussion in 'OS X El Capitan (10.11)' started by tyler550, Feb 18, 2016.

  1. tyler550 macrumors newbie

    Mar 8, 2015
    Hi everyone

    I'm going to turn on the file vault in my mac but I've read that the encryption process can take days.
    Will I be able to use my mac while the process is taking place,specifically downloading/saving files to my hard drive or will the encryption process hinder these activities?
  2. JohnDS macrumors 65816

    Oct 25, 2015
    It should only take a few hours if you have a reasonably new Mac and you can continue to work.
  3. tyler550 thread starter macrumors newbie

    Mar 8, 2015
    Thnx for responding

    Define reasonably? I have a mid 2011....It started of with a few days but it quickly dropping to 11 hours....Now sitting on 7 hours....It's gonna be a looooooong wait. I've read that it resumes after sleep/shut down so that's a plus.
    Just out of curiosity,if i were to ever switch off file vault will it take hours to switch off or is the process much faster than encrypting ?
  4. JohnDS macrumors 65816

    Oct 25, 2015
    Don't know the answer to your second question. Let it run overnight while on power and set it not to sleep.
  5. NoBoMac macrumors 65816

    Jul 1, 2014
    I have a 2008 MBP, it came with a 250GB HDD. When I turned on FileVault for that, it took about 7.5 hours to encrypt. When I put in a 250GB SSD, it took quite a bit less ( less than 3hrs, if I recall correctly).

    I did decrypt once, and it took a long time on the HDD, but don't recall how long it took. Guessing it was close to same time as encrypt, since it's the same algorithm, just going in reverse.
  6. KALLT macrumors 601

    Sep 23, 2008
    You can just turn it on, reboot and use your Mac normally. You do not have to pay attention to this and can just put the Mac to sleep whenever you want. It will resume and complete it automatically.
  7. Weaselboy Moderator


    Staff Member

    Jan 23, 2005
    It takes hours to unencrypt also if you turn off FV.

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