Windows still shows up on boot even after I deleted bootcamp partition

Question

Hi,El Capitan just came out, so I made a fresh install. I deleted all my partitions (OS X and Bootcamp) in the Disk Utility, then made a fresh El Capitan install.My problem is that when I press the alt key on boot, the Windows option still shows up, but I no longer have the bootcamp partition since I deleted it, because I no longer need windows.I tried choosing the windows option on boot to see what happens and it obviously goes into a blue screen repair mode (not a surprise since I deleted the entire partition).Is there any way to somehow remove Windows completely so it will no longer offer it as an option when I press alt during the boot? And to make sure there is not even a single byte stored on my computer that is related to windows.Thank you

Loner T · Answer

Yes. Mount the EFI partition of the external disk using diskutil mount diskNs1where &#x27;N&#x27; points to the external disk.Check for a Microsoft directory structure on the mounted EFI partition. Also, see Can&#x27;t resize Macintosh HD partition .

DiamondLINEx · Answer

Hello, it was 2 years ago haha, but is there a way to look for windows parts in the EFI partition? To check if I have any Windows remainings in it.I ran windows from an external thunderbolt drive and I see two Windows option on boot if I connect my external drive.If I do not connect it, then no Windows option pops up on boot. Thank you

DiamondLINEx · Answer

The external disk can have windows stuff on it since I use it to run windows.What I want to avoid is to have any windows remainings on my internal disk because I used bootcamp in the past.This is the output:/dev/disk0 (internal, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *121.3 GB   disk0   1:                        EFI EFI                     209.7 MB   disk0s1   2:          Apple_CoreStorage OSX-MacintoshLVG        121.0 GB   disk0s2   3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3/dev/disk1 (internal, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *1.0 TB     disk1   1:                        EFI EFI                     209.7 MB   disk1s1   2:          Apple_CoreStorage OSX-MacintoshLVG        999.3 GB   disk1s2   3:                 Apple_Boot Recovery HD             650.0 MB   disk1s3/dev/disk2 (internal, virtual):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                  Apple_HFS Macintosh HD           +1.1 TB     disk2                                 Logical Volume on disk0s2, disk1s2                                 401C84DF-3288-440F-BBCC-41B0303043A7                                 Unlocked Encrypted Fusion Drive

Loner T · Answer

1. Did you remove Windows using BC Assistant or Disk Utility?2. You have Microsoft remnants in your EFI partition which is causing you problems? Please see Can&#x27;t resize Macintosh HD partition (page 3 onwards).

DiamondLINEx · Answer

1. I used disk utility unfortunately...2. This is how it looks:total 4-rwxrwxrwx  1 szeldavid  staff  1300 Jún 27 15:11 BOOTLOGdrwxrwxrwx  1 szeldavid  staff   512 Dec  8  2014 EFI/Volumes/EFI/EFI:total 1drwxrwxrwx  1 szeldavid  staff  512 Már 24  2015 APPLE/Volumes/EFI/EFI/APPLE:total 3drwxrwxrwx  1 szeldavid  staff  512 Jún 27 14:20 CACHESdrwxrwxrwx  1 szeldavid  staff  512 Dec  8  2014 EXTENSIONSdrwxrwxrwx  1 szeldavid  staff  512 Jún 27 23:24 FIRMWARE/Volumes/EFI/EFI/APPLE/CACHES:total 2drwxrwxrwx  1 szeldavid  staff  1024 Jún 27 14:20 CAFEBEEF/Volumes/EFI/EFI/APPLE/CACHES/CAFEBEEF:/Volumes/EFI/EFI/APPLE/EXTENSIONS:total 30722-rwxrwxrwx  1 szeldavid  staff  15729264 Sze 30 18:49 Firmware.scap/Volumes/EFI/EFI/APPLE/FIRMWARE:total 16642-rwxrwxrwx  1 szeldavid  staff  8520304 Jún 27 23:24 IM151_0207_B03_LOCKED.scap

Loner T · Answer

Can you post the output ofdiskutil listsudo gpt -vv -r show /dev/disk0sudo fdisk /dev/disk0If you have a Fusion drive, then addsudo gpt -vv -r show /dev/disk1sudo fdisk /dev/disk1

DiamondLINEx · Answer

iMac-151:~ szeldavid$ diskutil list/dev/disk0 (internal, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *121.3 GB   disk0   1:                        EFI EFI                     209.7 MB   disk0s1   2:          Apple_CoreStorage Macintosh HD            121.0 GB   disk0s2   3:                 Apple_Boot Boot OS X               134.2 MB   disk0s3/dev/disk1 (internal, physical):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:      GUID_partition_scheme                        *1.0 TB     disk1   1:                        EFI EFI                     209.7 MB   disk1s1   2:          Apple_CoreStorage Macintosh HD            999.3 GB   disk1s2   3:                 Apple_Boot Recovery HD             650.0 MB   disk1s3/dev/disk2 (internal, virtual):   #:                       TYPE NAME                    SIZE       IDENTIFIER   0:                  Apple_HFS Macintosh HD           +1.1 TB     disk2                                 Logical Volume on disk0s2, disk1s2                                 1301FF5F-2AE5-4D89-A846-5AF2114C18D1                                 Unlocked Encrypted Fusion DriveiMac-151:~ szeldavid$ sudo gpt -vv -r show /dev/disk0gpt show: /dev/disk0: mediasize&#x3D;121332826112; sectorsize&#x3D;512; blocks&#x3D;236978176gpt show: /dev/disk0: PMBR at sector 0gpt show: /dev/disk0: Pri GPT at sector 1gpt show: /dev/disk0: Sec GPT at sector 236978175      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  236306352      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC  236715992     262144      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC  236978136          7           236978143         32         Sec GPT table  236978175          1         Sec GPT headeriMac-151:~ szeldavid$ sudo fdisk /dev/disk0Disk: /dev/disk0 geometry: 14751/255/63 [236978176 sectors]Signature: 0xAA55         Starting       Ending #: id  cyl  hd sec -  cyl  hd sec [     start -       size]------------------------------------------------------------------------ 1: EE 1023 254  63 - 1023 254  63 [         1 -  236978175] &lt;Unknown ID&gt; 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      iMac-151:~ szeldavid$ sudo gpt -vv -r show /dev/disk1gpt show: /dev/disk1: mediasize&#x3D;1000204886016; sectorsize&#x3D;512; blocks&#x3D;1953525168gpt show: /dev/disk1: PMBR at sector 0gpt show: /dev/disk1: Pri GPT at sector 1gpt show: /dev/disk1: Sec GPT at sector 1953525167       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  1951844040      2  GPT part - 53746F72-6167-11AA-AA11-00306543ECAC  1952253680     1269536      3  GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC  1953523216        1919           1953525135          32         Sec GPT table  1953525167           1         Sec GPT header

Loner T · Answer

Please post the output of Fdisk for disk1. You have two EFI partitions. You need to check both for any Microsoft parts, not just disk0, but disk1 as well.If you want to avoid all Terminal work, you can backup OSX, erase the Fusion disk, and restore from backup.

DiamondLINEx · Answer

iMac-151:~ szeldavid$ sudo fdisk /dev/disk1Disk: /dev/disk1 geometry: 121601/255/63 [1953525168 sectors]Signature: 0xAA55         Starting       Ending#: id  cyl  hd sec -  cyl  hd sec [     start -       size]------------------------------------------------------------------------1: EE 1023 254  63 - 1023 254  63 [         1 - 1953525167] &lt;Unknown ID&gt;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     iMac-151:~ szeldavid$I did erase the whole disk before I installed a clean El Capitan and I still see Windows as an option when I press alt...

Loner T · Answer

If you have a Time Machine backup, we can rebuild your Fusion disk and restore from TM and test.

DiamondLINEx · Answer

I have one, but I wanted a clean install and manually copy back my documents only.If I erase the whole disk and install El Capitan again from an USB drive do you think the windows option will be gone?Does it erase all EFI stuff?

Loner T · Answer

Post the output of diskutil cs list and we can rebuild the Fusion drive using the LV/LVG UUIDs. We can use Internet Recovery to rebuild the Fusion drive and then you can restore.

DiamondLINEx · Answer

I&#x27;m in the internet recovery now.heres the output:What should we do next? 🙂thank you

Loner T · Answer

You have FileVault2. You will need to turn it off first when booted normally. Then check if you still have a output from diskutil cs list. If you do, post the text version when booted normally, it makes it easier to cut and paste.

DiamondLINEx · Answer

iMac-151:~ szeldavid$ diskutil cs listCoreStorage logical volume groups (1 found)|+-- Logical Volume Group 874AC3D0-9B5A-4869-BB9A-6E6B536184DE    &#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:         1120333000704 B (1.1 TB)    Free Space:   6141431808 B (6.1 GB)    |    +-&lt; Physical Volume 5D290A72-F5E5-438B-B3A0-4ABD81793C38    |   ----------------------------------------------------    |   Index:    0    |   Disk:     disk0s2    |   Status:   Online    |   Size:     120988852224 B (121.0 GB)    |    +-&lt; Physical Volume 46D80AF7-B4B0-4EDA-87A0-8FD4FD61CF61    |   ----------------------------------------------------    |   Index:    1    |   Disk:     disk1s2    |   Status:   Online    |   Size:     999344148480 B (999.3 GB)    |    +-&gt; Logical Volume Family 316E1822-17C7-4F75-8B16-93327AD8E75B        ----------------------------------------------------------        Encryption Type:         None        |        +-&gt; Logical Volume 1301FF5F-2AE5-4D89-A846-5AF2114C18D1            ---------------------------------------------------            Disk:                  disk2            Status:                Online            Size (Total):          1108336312320 B (1.1 TB)            Conversion Progress:   Complete            Revertible:            No            LV Name:               Macintosh HD            Volume Name:           Macintosh HD            Content Hint:          Apple_HFS            LVG Type:              Fusion, SparseiMac-151:~ szeldavid$