Mac OSX Sierra Prohibitory sign

Discussion in 'macOS Sierra (10.12)' started by Adrian_88, Mar 31, 2017.

  1. Adrian_88 macrumors newbie

    Mar 31, 2017
    Hello bro, recently i faced a message error that says there is not enough free space in the disk when i was trying to download a document from my email even though i have had tons of it, like around 100gb. I have a macbook pro with osx sierra, the latest version. So I looked up the internet and somehow they told me to change some permissions on the download file and restart the computer. However, after doing so, my computer is now faced with a prohibitory sign that wont boot up. I havent done anything to it like a PRAM reset because I am afraid that I would lose my data as some of my friends have pointed out. Anyway, i can still access internet recovery and disk utility still showing all my datas available, just that when i clicked on the info, i saw under its bootable category, it says no. Is if something to do with permission repair, i have yet to verify my disk utility as im very scared to do anything that would erase my data. What do i do? Thank you
    Please help me out
  2. KoolAid-Drink macrumors 65816

    Sep 18, 2013
    It might be that your HD is failing. Try turning on the computer and pressing COMMAND and S at the same time, then see what happens?

    If you make it to the prompt, type: fsck -fy

    Alternatively, boot from recovery or another HD (USB or whatnot) that has macOS or the installer, then see if it is able to read your HD.
  3. Adrian_88 thread starter macrumors newbie

    Mar 31, 2017
    i am able to read it
  4. Fishrrman macrumors P6


    Feb 20, 2009
    Download the free, small utility called DiskWave:

    Just launch it.
    You'll see what to do next.
    TIP: choose to make normally-inivisible files VISable.

    It will show you what's eating up the space on your drive.
  5. Adrian_88 thread starter macrumors newbie

    Mar 31, 2017
    Alrite i will give it a try

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