Dalthomali

Q: i have i mac retna 27 inches , i install os x el capitan then i had some problem , i try to format the sys by utility, after formating i try to install fresh copy but it ask me in wich disk you want to install and no disk found.pls how to finde disk

i have imac retna 5k 27 inches


after i install ox x EL CAPITAN i hade som problem


then i format the computer by disk utility


then i try to install fresh copy but it ask me in wiche disk you want to install


i try to finde disk but there is no disk available

please hoe to finde disk after i format

i did the flowing

i restart acomputer while i press cmd and R

disk utility shows up

i erase  disk then i try to install fresh copy but it ask me which disk you want instaal but there is no disk 


how i finde disk please

tks

Posted on Nov 11, 2015 4:44 AM

Close

Q: i have i mac retna 27 inches , i install os x el capitan then i had some problem , i try to format the sys by utility, after forma ... more

  • All replies
  • Helpful answers

Previous Page 2
  • by Dalthomali,

    Dalthomali Dalthomali Dec 24, 2015 2:56 PM in response to EVISCERATOR
    Level 1 (0 points)
    Dec 24, 2015 2:56 PM in response to EVISCERATOR

    you said i erased the recovery partition , ok

    how i get back this partition

    tks

  • by EVISCERATOR,

    EVISCERATOR EVISCERATOR Dec 24, 2015 3:49 PM in response to Dalthomali
    Level 1 (117 points)
    Dec 24, 2015 3:49 PM in response to Dalthomali

    Hi Dalthomali, The best thing to do is take it to the apple store.  If that is not possible, then, if you can boot into internet recovery, follow the instructions near the end of this post  el capitan update wiped my details.  These instructions were for a similar problem.

    Best of luck: Tom

    FUSION DRIVE.png

    P.S  This is the short version and you would have to reinstall the original OS on your iMac then update to El Capitan.

  • by Dalthomali,

    Dalthomali Dalthomali Dec 26, 2015 2:50 PM in response to EVISCERATOR
    Level 1 (0 points)
    Dec 26, 2015 2:50 PM in response to EVISCERATOR

    I understand in terminal i put the flowing:

    diskutil corestorage delete ( flollowed by UUID sring )

    where can i finde UUID string

    i obtained corestorage list but no UUID No.

    see attachedIMG_0341.JPGwhere is uuid no in above photo

  • by EVISCERATOR,

    EVISCERATOR EVISCERATOR Dec 26, 2015 4:10 PM in response to Dalthomali
    Level 1 (117 points)
    Dec 26, 2015 4:10 PM in response to Dalthomali

    Hi Dalthomali,   The UUID that you want is the top one next to  Logical Volume Group.  Simply high lite it with your mouse  and then use   command c keys   to copy.  Next, type into terminal   diskutil coreStorage delete    then  command v  to paste.    Press enter and let it work.  When it is finished type exit then quit terminal.  Go back to disk utility and the 2 drives should be red.  Click on the SSD and you should get a pop up that offers to Fix.

    Select Fix and it will repair your fusion drive.  You can then exit disk utility and install OS X on the Macintosh HD.  If you are using internet recovery then it will install the original OS.

    If you have a bootable installer for El Capitan, you can simply shut down the iMac after the fusion drive is fixed.  Plug in the installer and restart holding the option key.

     

    Note do not do this with El Capitan's disk utility.  It will not fix a fusion drive.  Only the disk utility of Lion thru Yosemite will do this.  I have found that Yosemite is best, but they all work.

    If, after deleting the coreStorage , disk utility does not offer to fix the drive simply shut down the iMac and boot into internet recovery (hold option command r  at start up until you see a spinning globe)  and the disk utility there will fix the drive provided that it is a factory installed fusion drive.

     

    The first time I did this it was nerve racking.  But it gets easy with practice.  Please let me know how it went ask if you need more help.

    Best of Luck: Tom

  • by Dalthomali,

    Dalthomali Dalthomali Dec 26, 2015 4:34 PM in response to EVISCERATOR
    Level 1 (0 points)
    Dec 26, 2015 4:34 PM in response to EVISCERATOR

    Hi EVISCERATOR

    I did what you said as flow:

    diskutil coreStorage delete ( space ) UUID No. which  is in the top next to  Logical Volume Group,but it didn't help,

    it said no such storage core or something like this ( i forgot )

    then i  start internet recovery  and no help also

    please see attached


    IMG_0343.jpgIMG_0342.jpg

  • by EVISCERATOR,

    EVISCERATOR EVISCERATOR Dec 26, 2015 6:01 PM in response to Dalthomali
    Level 1 (117 points)
    Dec 26, 2015 6:01 PM in response to Dalthomali

    Hi Dalthomali,  It appears that a firmware password has been set.  If you know what that password  is then you can unlock it, if you used file vault to encrypt the drive, then turn off file vault and try again.  You might try a new post asking how to unlock a drive.  That is all I can think of for now.

    Tom

  • by EVISCERATOR,

    EVISCERATOR EVISCERATOR Dec 26, 2015 6:22 PM in response to Dalthomali
    Level 1 (117 points)
    Dec 26, 2015 6:22 PM in response to Dalthomali

    Just another thought, You can boot into internet recovery and use terminal and disc utilities from there.  What was the computer's original OS?

  • by EVISCERATOR,

    EVISCERATOR EVISCERATOR Dec 26, 2015 7:16 PM in response to Dalthomali
    Level 1 (117 points)
    Dec 26, 2015 7:16 PM in response to Dalthomali

    Just to be clear this is the UUID string.

    IMG_0341.JPG

Previous Page 2