Deleting Partition after unsuccessful windows installation

Question

GreetingsI tried to install windows 8.1 using bootcamp assistance on my macbook pro retina. It downloaded all the necessary drivers, recognized my iso file and made partition successfully . but when it restarted computer no installation windows showed up. So I tried to repeat by bootcamp but it said that windows is installed so I only was able to remove windows. But it stuck when it was removing the partition and after that I cannot use devoted space to windows. I even tried disk utility but I am not able to delete partition the key is gray. So how can I delete that partition and use my hair drive as one partition.

dwb · Accepted Answer

Restart in Recovery Mode (hold command &amp; R keys after you reboot). Once in recovery run Disk Utility. First see if you can delete the 2nd partition - that will be the Windows partition. Sometimes this can be done from recovery when it cannot be done from the Mac boot partition. If it fails here too then your only choice will be to repartition the drive (1 Mac partition) and then (hopefully) restore from a recent Mac backup.

prmjs · Answer

It won&#x27;t let me to do so. How should I repartition the drive?

Loner T · Answer

This is a tricky exercise with a CoreStorage volume. Can you post the output of the following Terminal commands?diskutil listdiskutil cs listsudo gpt -vv -r show /dev/disk0sudo fdisk /dev/disk0The "sudo" commands will prompt for your password, and it will not be echoed back. You may also see a warning about improper use of "sudo" and potential data loss due to "abuse" of the command.

prmjs · Answer

/dev/disk0   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *251.0 GB   disk0   1:                        EFI EFI                     209.7 MB   disk0s1   2:          Apple_CoreStorage                         159.4 GB   disk0s2   3:                 Apple_Boot Recovery HD             650.0 MB   disk0s3/dev/disk1   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                  Apple_HFS Macintosh HD           *159.0 GB   disk1                                 Logical Volume on disk0s2                                 A4694DD7-A6DC-45BF-94F2-99830002C0E4                                 UnencryptedJavads-MacBook-Pro:~ javad$ diskutil cs listCoreStorage logical volume groups (1 found)|+-- Logical Volume Group BE9F36A6-814D-482E-A689-B4B9B5890077    &#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;&#x3D;    Name:         Macintosh HD    Status:       Online    Size:         159361245184 B (159.4 GB)    Free Space:   8921088 B (8.9 MB)    |    +-&lt; Physical Volume 287BCC1F-4549-4B37-9354-03CA2A599BED    |   ----------------------------------------------------    |   Index:    0    |   Disk:     disk0s2    |   Status:   Online    |   Size:     159361245184 B (159.4 GB)    |    +-&gt; Logical Volume Family 8F0FC88B-1512-40B2-8ADF-002B319A6147        ----------------------------------------------------------        Encryption Status:       Unlocked        Encryption Type:         None        Conversion Status:       NoConversion        Conversion Direction:    -none-        Has Encrypted Extents:   No        Fully Secure:            No        Passphrase Required:     No        |        +-&gt; Logical Volume A4694DD7-A6DC-45BF-94F2-99830002C0E4            ---------------------------------------------------            Disk:                  disk1            Status:                Online            Size (Total):          159000002560 B (159.0 GB)            Conversion Progress:   -none-            Revertible:            Yes (no decryption required)            LV Name:               Macintosh HD            Volume Name:           Macintosh HD            Content Hint:          Apple_HFSJavads-MacBook-Pro:~ javad$ sudo gpt -vv -r show /dev/disk0Password:Sorry, try again.Password:gpt show: /dev/disk0: mediasize&#x3D;251000193024; sectorsize&#x3D;512; blocks&#x3D;490234752gpt show: /dev/disk0: PMBR at sector 0gpt show: /dev/disk0: Pri GPT at sector 1gpt show: /dev/disk0: Sec GPT at sector 490234751      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  311252432      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC  311662072    1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC  312931608  177303111           490234719         32         Sec GPT table  490234751          1         Sec GPT header

Loner T · Answer

The Gap after GPT3 is all your free space. As dwb suggests, here are the steps. You will need a Time Capsule or an external TB/FW/USB drive which is roughly 1.5 times the disk space that you have allocated in OSX.1. Back up OSX using Time Machine - Mac Basics: Time Machine backs up your Mac - Apple Support.2. Boot into Internet Recovery - OS X: About OS X Recovery - Apple Support.3. Erase your internal drive and restore from the TM backup in Step 1 - OS X Yosemite: Recover your entire system.Please be aware that TM does not backup Bootcamp partitions.There is also a Terminal method using diskutil commands, which requires merging partitions (which also causes Recovery HD to be temporarily lost). Recovery HD can be rebuilt by reinstalling the current version of OSX after the merge operations are complete.The first method requires more time, but minimizes chances of human error.