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I accidentally created a partition of 1.05GB space. Went to Disk Utility -> Partition, and I clicked on the - sign to remove it and hit "apply".

enter image description here It gives me the following error:

enter image description here

I have another 40GB of free space partition after this 1GB partition that I want to merge with so can I get back to a single partition for an entire disk again. Any ideas how I could fix this?

diskutil list:

/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *251.0 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:          Apple_CoreStorage Macintosh HD            195.6 GB   disk0s2
   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3
   4:                  Apple_HFS Untitled                54.0 GB    disk0s4
/dev/disk1 (internal, virtual):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                  Apple_HFS Macintosh HD           +195.2 GB   disk1
                                 Logical Volume on disk0s2
                                 D7989525-A492-467F-9631-6214317713EE
                                 Unlocked Encrypted

diskutil cs list

CoreStorage logical volume groups (1 found)
|
+-- Logical Volume Group E62C1353-2508-415A-BDC1-1EEAE65D9303
    =========================================================
    Name:         Macintosh HD
    Status:       Online
    Size:         195605651456 B (195.6 GB)
    Free Space:   11182080 B (11.2 MB)
    |
    +-< Physical Volume DEC475C0-94E9-4415-A6DC-AA7578AD239D
    |   ----------------------------------------------------
    |   Index:    0
    |   Disk:     disk0s2
    |   Status:   Online
    |   Size:     195605651456 B (195.6 GB)
    |
    +-> Logical Volume Family E7A40A0F-9D63-46DA-8E39-AF0CDCE8A39D
        ----------------------------------------------------------
        Encryption Type:         AES-XTS
        Encryption Status:       Unlocked
        Conversion Status:       Complete
        High Level Queries:      Fully Secure
        |                        Passphrase Required
        |                        Accepts New Users
        |                        Has Visible Users
        |                        Has Volume Key
        |
        +-> Logical Volume D7989525-A492-467F-9631-6214317713EE
            ---------------------------------------------------
            Disk:                  disk1
            Status:                Online
            Size (Total):          195242147840 B (195.2 GB)
            Revertible:            Yes (unlock and decryption required)
            Revert Status:         Reboot required
            LV Name:               Macintosh HD
            Volume Name:           Macintosh HD
            Content Hint:          Apple_HFS

sudo gpt -r show /dev/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  382042288      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC
  382451928    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC
  383721464     786432         
  384507896  105464672      4  GPT part - 48465300-0000-11AA-AA11-00306543ECAC
  489972568     262151         
  490234719         32         Sec GPT table
  490234751          1         Sec GPT header

sudo fdisk /dev/disk0

Disk: /dev/disk0    geometry: 30515/255/63 [490234752 sectors]
Signature: 0xAA55
         Starting       Ending
 #: id  cyl  hd sec -  cyl  hd sec [     start -       size]
------------------------------------------------------------------------
 1: EE 1023 254  63 - 1023 254  63 [         1 -  490234751] <Unknown ID>
 2: 00    0   0   0 -    0   0   0 [         0 -          0] unused      
 3: 00    0   0   0 -    0   0   0 [         0 -          0] unused      
 4: 00    0   0   0 -    0   0   0 [         0 -          0] unused      
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  • Add the output from the following Terminal application commands to your question. These commands will not change your computer. The commands are: diskutil list, diskutil cs list, sudo gpt -r show /dev/disk0 and sudo fdisk /dev/disk0. I assume this is your main internal drive. May 21, 2016 at 21:22
  • Yes, this is my main internal drive. Added the outputs from your commands
    – Dewei Chen
    May 22, 2016 at 2:44

1 Answer 1

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The Terminal application commands are shown below.

diskutil  erasevolume  "Free Space"  ""  /dev/disk0s4
diskutil  cs  resizestack  D7989525-A492-467F-9631-6214317713EE  0

The first command deletes your 54 GB Untitled partition. The second command merges all the free space back in to the other partition.

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  • I restarted and updated diskutil list.. looks the same to me
    – Dewei Chen
    May 22, 2016 at 15:24
  • @Dewei: If click on the "edited" link, you will see the difference. The partitions are now in sequential order. Go ahead and enter the commands posted in my answer. May 22, 2016 at 15:33

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