I used Unetbootin and accidentally chose a partition on my HDD to install the Lubuntu Live-USB I wanted to create on an USB Stick.

Now, my HDD looks like this

iMac HD

I can boot into Mac OS X and everything works fine.

This is a 4TB SHDD. Is there any option to recreate the original settings with only one partition?

GPT fdisk (gdisk) shows the following:

Warning: Devices opened with shared lock will not have their
partition table automatically reloaded!
Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.

Command (? for help): x

Expert command (? for help): o

Disk size is 7814037168 sectors (3.6 TiB)
MBR disk identifier: 0x00000000
MBR partitions:

Number  Boot  Start Sector   End Sector   Status      Code
   1                     1   4294967294   primary     0xEE

Expert command (? for help): 

gpt and diskutil output is:

    BVs-iMac-3:~ bvimac$ sudo gpt -r show disk0
       start        size  index  contents
           0           1         PMBR
           1           1         Pri GPT header
           2          32         Pri GPT table
          34           6         
          40      409600      1  GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B
      409640  2728147912      2  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  2728557552     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
  2729827088        1264         
  2729828352  2529234944      4  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
  5259063296      262144      5  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
  5259325440  2554711695         
  7814037135          32         Sec GPT table
  7814037167           1         Sec GPT header
BVs-iMac-3:~ bvimac$ diskutil cs list
CoreStorage logical volume groups (1 found)
+-- Logical Volume Group 28A99931-20D1-4D0C-8B5A-9872BC7270E2
    Name:         LINUX
    Status:       Online
    Size:         1294968291328 B (1.3 TB)
    Free Space:   1294632738816 B (1.3 TB)
    +-< Physical Volume 42D47656-F1D4-4FE4-BAB2-D572CA06D233
        Index:    0
        Disk:     disk0s4
        Status:   Online
        Size:     1294968291328 B (1.3 TB)
  • Please add the output of sudo gpt -r show disk0 and diskutil cs listto your question. – klanomath Jan 31 '17 at 17:44
  • 1
    BTW you didn't create a Linux LVM (UUID: E6D6D379-F507-44C2-A23C-238F2A3DF928) but a Apple CoreStorage LVG (UUID: 53746F72-6167-11AA-AA11-00306543ECAC) – klanomath Feb 1 '17 at 13:19
  • Is this the same system as apple.stackexchange.com/questions/271092/… ? – bmike Feb 1 '17 at 17:44
  • No. The other one is a Laptop with a currently unbootable Windows partition. This one here was an iMac where Unetbootin went the wrong way. – Ben Feb 1 '17 at 18:05

The following should work:

  • Open Terminal and enter:

    diskutil list
    diskutil cs list
  • Verify (and repair) the volume if necessary:

    diskutil verifyVolume disk0s2

    If a repair is required boot to Recovery Mode and repair the main OS X volume.

  • Delete the Logical Volume Group

    diskutil cs delete 28A99931-20D1-4D0C-8B5A-9872BC7270E2

    This should convert the LVG LINUX to a normal partition

  • Then enter diskutil list again and erase the 134 MB and the 1.3 TB partition (use the proper disk identifiers found in your listing above here):

    diskutil eraseVolume Free Space disk0s5
    diskutil eraseVolume Free Space disk0s4
  • Verify the volume again:

    diskutil verifyVolume disk0s2
  • Check the limits of disk0s2

    diskutil resizeVolume disk0s2 limits

    This will output something like that:

    For device disk0s2 iMac HD:
        Current size:  1.4 TB (1396811730944 Bytes)
        Minimum size:  ? 
        Maximum size:  ?
  • Try to expand the main volume - you can't expand the volume beyond the limit shown in the previous output

     diskutil resizeVolume disk0s2 R

    If the R size option fails try to use a real size like 3999g or a percentage 100% (on some external disks this may fail because of some 2 TiB limit).

     diskutil resizeVolume disk0s2 3999927271424b


     diskutil resizeVolume disk0s2 100%
| improve this answer | |
  • @Ben I read your other question. David Anderson probably provided an answer to your question already. I don't find the duplicate though. – klanomath Jan 31 '17 at 22:22
  • The answer helped. I deleted the LVG. But i cannot resize the disk0s2. Maximum size is I as current size. I suspect it is because the Recovery partition is in the way. I was able to do it via disk utility, though. – Ben Feb 1 '17 at 13:08
  • @Ben It's usually possible to resize a HFS partition and a subsequent Recovery partition. It's not possible to resize 3 partition at once (e.g. hfs+recovery+ntfs -> free space). A resize may also fail after modifying the partition layout with Boot Camp. – klanomath Feb 1 '17 at 13:14
  • After using this answer my recovery partition was broken and I had to remove it. apple.stackexchange.com/questions/271254/… – Ben Feb 2 '17 at 2:23
  • @Ben The commands in my answer shouldn't touch the Recovery HD! – klanomath Feb 2 '17 at 2:27

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .