Boot Drive read only on Macbook pro Help!

Discussion in 'MacBook Pro' started by GreenApple29, Jan 20, 2014.

  1. GreenApple29 macrumors regular

    GreenApple29

    Joined:
    Jun 8, 2008
    #1
    Hello all
    out of the blue today i tried to download an application (Xcode beta to be exact) and i couldn't install it
    i right clicked on my internal boot drive and i saw that the drive was read only
    very confused since i haven't touched any of permissions...
    Does anyone have any ideas or experience regarding this issue?
    Thanks
     
  2. Weaselboy Moderator

    Weaselboy

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    California
    #2
    Where did you right click that you are seeing this read only message? Can you save anything to the drive at all?
     
  3. GreenApple29 thread starter macrumors regular

    GreenApple29

    Joined:
    Jun 8, 2008
    #3
    right clicked on the Macintosh HD icon on the sidebar of the Finder and the on "Get Info"
    and dialog box opened saying read only on the preferences
    a new problem occurred though more serious
    i tried a few things and now..whne i turned on the macbook i am seeing the grey start up screen with apple logo and spinning wheel but nothing is happening
    have tried a few things
    like reseting PVRAM
    Safe boot
    etc
    nothing
    only thing that left is restoring from TM which due to wifi is taking ages
    will get back when this is done
    i hope that i caused the problem with permission..i hope there is nothing wrong with the disk cos ill have to wait for repair a week to have it back :(
     
  4. Weaselboy, Jan 20, 2014
    Last edited: Jan 20, 2014

    Weaselboy Moderator

    Weaselboy

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    #4
    I'm still not clear where you are seeing read only. Below is get info on my machine. Can you point out there what you mean?

    There is nothing on a Mac that would spontaneously make your disk read only. The grey spinning coupled with this make me suspicious maybe your drive is failing, and a Time Machine restore will not fix that.

    What OS version are you on? If Lion or newer, try holding command-r when booting and using Disk Util from there to do a repair disk. What does that say?

    [​IMG]
     
  5. GreenApple29 thread starter macrumors regular

    GreenApple29

    Joined:
    Jun 8, 2008
    #5
    on your screenshot i had the same..maybe t was my mistake
    on the screenshot it says "you can only read"
    have i done something wrong?
    i mean..after that inlayed with permissions..and propably that is the reason why my mac dint boot up and stayed on grey screen with apple and spinning wheel
    i could do the suggestion you mentioned but i can't now..cos I'm restoring from a TM backup
    :(
    maybe i acted too quickly....
     
  6. DeltaMac macrumors 604

    DeltaMac

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    Location:
    Delaware
    #6
    If you do this - command-t won't do anything useful. Weaselboy SHOULD have said command-r, which will boot you to the recovery partition, where you can (among other choices) run Disk Utility.
     
  7. GreenApple29 thread starter macrumors regular

    GreenApple29

    Joined:
    Jun 8, 2008
    #7
    yes thats something i tried even though not sure if i pressed both keys at same time
    at the moment though i am restoring from TM back up
    i suppose if there was a drive failure that would have stopped the restore?
    the restore dis at almost 50 per cent and has four hours to complete
    see how it goes
    just curious though..
    why does it say "you can only read"
    and if this is normal
    why when i tried to install Xcode downloaded from apple's dev center it didn't let me install?
     
  8. Weaselboy Moderator

    Weaselboy

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    #8
    Thanks for the catch of my typo. Obviously it should be command-r. :)

    ----------

    What year is your Mac and what OS version are you on?

    I'm still not clear where you are seeing this "you can only read" message. Can you be more specific?
     
  9. GreenApple29 thread starter macrumors regular

    GreenApple29

    Joined:
    Jun 8, 2008
    #9
    macbook pro 13 retina

    as for the message
    check your screenshot
    below the hard drive image
    it says sharing and preferences
    just below that it says
    you can only read
    it shows this on your screenshot too
     
  10. DeltaMac macrumors 604

    DeltaMac

    Joined:
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    Delaware
    #10
    @Weaselboy - your own post of your Get Info window shows You can only Read, as the first item under Sharing & Permissions. That's likely what the OP saw, and took that as a problem.
     
  11. GreenApple29 thread starter macrumors regular

    GreenApple29

    Joined:
    Jun 8, 2008
    #11
    so its not a problem?
    i mean..i had the same problem with an external drive and i couldn't move files to that drive when it showed "you can only read " message ...
     
  12. Weaselboy Moderator

    Weaselboy

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    #12
    I see what you mean now... I thought you were referring to some other message that showed the entire drive as read only. If yours get info looks like mine, that is completely normal and not causing you a problem.

    So let's back up. You downloaded an Xcode beta DMG direct from Apple and could not install it? What exactly did you do and what happened?

    So everything else on your Mac seems to be working fine?

    ----------

    That is a different issue. If your get info looks like mine, your is normal and not a problem.
     
  13. GreenApple29 thread starter macrumors regular

    GreenApple29

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    Jun 8, 2008
    #13


    i can't remember the message i got..it seemed it couldn't install the version that i downloaded
    plus i can't check now cos now as i said its a mess
    i am restoring from time machine back up and see if everything is ok
    only problem is that back up is thrtee days old..and Xcode project...is backdated :(
     
  14. Weaselboy Moderator

    Weaselboy

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    #14
    It sounds like maybe just a version of Xcode that is not compatible with Mavericks and the installer stopped you from using it.
     
  15. GreenApple29 thread starter macrumors regular

    GreenApple29

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    Jun 8, 2008
    #15
    so all this trouble and restore for nothing huh?
    so why does it show on get info you can only read?
    just curious
    hope after restore everything would be ok!
     
  16. Weaselboy Moderator

    Weaselboy

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    #16
    Yeah... pretty much. :(


    Because Macintosh HD is at the root level of drive and as a normal user you don't have write access there. If you do the same thing on /Applications for example, you will see you do have read/write access.

    [​IMG]
     
  17. GreenApple29 thread starter macrumors regular

    GreenApple29

    Joined:
    Jun 8, 2008
    #17
    Restore completed (even though at start i thought this will take ages cos of wifiit actually went pretty good!)
    now back to my system even though a bit backdated due to a restore point four days ago...

    as for the sharing yeah i see what you mean
    still don't understand though what happened and when i tried to start mac it stuck on grey screen with apple logo and spinning wheel?
    maybe a problem with permissions?
    as for downloading apps and install them it seems that everything is ok now...
     
  18. Weaselboy Moderator

    Weaselboy

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    #18
    Unless you manually messed around with disk permission settings, nothing would have changed to cause that error. Did you try the command-r boot and Disk Util check I mentioned earlier? That would show any disk errors.
     
  19. GreenApple29 thread starter macrumors regular

    GreenApple29

    Joined:
    Jun 8, 2008
    #19
    will try this now...even though system now runs good after time machine restore
    yes i think i messed up with permissions thinking that my drive is read only..but as you mentioned this isn't the case and drive was read and write so was my fault
    The good side was that i had a time machine backup :)
    do you think i should run a command r now?or it doesn't matter anymore?
     
  20. Weaselboy Moderator

    Weaselboy

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    #20
    I would do the command-r and disk check anyway. It certainly does not hurt anything.
     
  21. GreenApple29 thread starter macrumors regular

    GreenApple29

    Joined:
    Jun 8, 2008
    #21

    Just did command r entered disk utility and check disk
    Green message appeared saying disk appears to be ok
    Pressed repair permissions as well
    Everything seems to be fine
    I think it was my fault since machine is only three weeks old

    ----------


    Also would like to say a big thanks to you and your recommendations
    Thank you for your time:))
     
  22. Weaselboy Moderator

    Weaselboy

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    #22
    You bet... glad to help. :)
     
  23. barkmonster, Jan 21, 2014
    Last edited: Jan 21, 2014

    barkmonster macrumors 68020

    barkmonster

    Joined:
    Dec 3, 2001
    Location:
    Lancashire
    #23
    Boot into recovery mode.

    Open terminal

    Follow these instructions: -

    In Terminal type the following sequence (obviously replace “Volumename with the name of your volume):

    sudo chflags 0 /Volumes/Volumename
    sudo chown 0:80 /Volumes/Volumename
    sudo chmod 775 /Volumes/Volumename
    sudo chmod -N /Volumes/Volumename

    but if your hard drives name includes a [space] like this: “My HD”, then you must write the command like this:

    sudo chflags 0 /Volumes/firstname\ secondname
    sudo chown 0:80 /Volumes/firstname\ secondname
    sudo chmod 775 /Volumes/firstname\ secondname
    sudo chmod -N /Volumes/firstname\ secondname

    It'll reset all the permissions on the drive completely where as "repair permissions" with disk utility won't help.

    It's also handy for situations where you've maybe upgraded your OS on 1 disk and store files on another which can often end up with it's permissions changed to "custom". It happened to me when trying to create a dual boot of 10.8.5 and 10.6.8 and it was the only thing that unlocked the drive again.

    That's what happens when you hit reply and spend about 15 minutes digging around your HD for a text file before you do. Sorry, your problem is already solved, ignore above (or keep it for future use)
     

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