wykstra

Q: Unable to boot into mac or bootcamp

I was stupid to create a new partition from bootcamp so that I can share files between mac and windows easily. It converted the partitions to dynamic I think. I can't boot into mac or windows. Is there a way I can boot into mac without reinstalling ? My time machine back up is very old so I want to get back into mac without restoring it. I appreciate it very much and would follow all the instructions.

 

I was able to get into internet recovery and terminal.

 

IMG_2099.JPG

MacBook Pro (Retina, 15-inch, Early 2013), OS X El Capitan (10.11.2)

Posted on Jan 14, 2016 10:27 PM

Close

Q: Unable to boot into mac or bootcamp

  • All replies
  • Helpful answers

Previous Page 2 of 4 last Next
  • by Loner T,

    Loner T Loner T Jan 15, 2016 7:14 PM in response to wykstra
    Level 7 (24,098 points)
    Safari
    Jan 15, 2016 7:14 PM in response to wykstra

    Excellent. The text version is easy to cut and paste. Using the the first 4 entries, we are going to create a new GPT using Gdisk. Do not enter anything in the parentheses. Please verify all numbers.

     

    sudo gdisk /dev/disk0

    o (Create a new GPT)

    n (New)

    1

    40

    409639

    EF00

    n

    2

    409640

    829351119

    AF00

    n

    3

    829351120

    830620655

    AB00

    n

    4

    830621696

    977104895

    p

    w

    y


    Once you have this saved, check if Finder shows your internal disk with proper folders. If you confirm then we proceed further.

  • by wykstra,

    wykstra wykstra Jan 15, 2016 7:24 PM in response to Loner T
    Level 1 (0 points)
    Jan 15, 2016 7:24 PM in response to Loner T

    Command (? for help): o

    This option deletes all partitions and creates a new protective MBR.

    Proceed? (Y/N):

     

    Should I proceed ?

  • by Loner T,

    Loner T Loner T Jan 15, 2016 7:36 PM in response to wykstra
    Level 7 (24,098 points)
    Safari
    Jan 15, 2016 7:36 PM in response to wykstra

    Yes, because later steps are re-creating a set of GPT entries with the corruption at the end.

  • by wykstra,

    wykstra wykstra Jan 15, 2016 7:41 PM in response to Loner T
    Level 1 (0 points)
    Jan 15, 2016 7:41 PM in response to Loner T

    Command (? for help): o

    This option deletes all partitions and creates a new protective MBR.

    Proceed? (Y/N): Y

     

    Command (? for help): n

    Partition number (1-128, default 1): 1

    First sector (34-977105026, default = 2048) or {+-}size{KMGTP}: 40

    Information: Moved requested sector from 40 to 2048 in

    order to align on 2048-sector boundaries.

    Use 'l' on the experts' menu to adjust alignment

    Last sector (2048-977105026, default = 977105026) or {+-}size{KMGTP}: 409639

    Current type is 'Apple HFS/HFS+'

    Hex code or GUID (L to show codes, Enter = AF00): EF00

    Changed type of partition to 'EFI System'

     

    Command (? for help): n

    Partition number (2-128, default 2): 2

    First sector (34-977105026, default = 411648) or {+-}size{KMGTP}: 409640

    Information: Moved requested sector from 409640 to 411648 in

    order to align on 2048-sector boundaries.

    Use 'l' on the experts' menu to adjust alignment

    Last sector (411648-977105026, default = 977105026) or {+-}size{KMGTP}: 829351119

    Current type is 'Apple HFS/HFS+'

    Hex code or GUID (L to show codes, Enter = AF00): AF00

    Changed type of partition to 'Apple HFS/HFS+'

     

    Command (? for help): n

    Partition number (3-128, default 3): 3

    First sector (34-977105026, default = 829351936) or {+-}size{KMGTP}: 829351120

    Information: Moved requested sector from 829351120 to 829351936 in

    order to align on 2048-sector boundaries.

    Use 'l' on the experts' menu to adjust alignment

    Last sector (829351936-977105026, default = 977105026) or {+-}size{KMGTP}: 830620655

    Current type is 'Apple HFS/HFS+'

    Hex code or GUID (L to show codes, Enter = AF00): AB00

    Changed type of partition to 'Recovery HD'

     

    Command (? for help): n

    Partition number (4-128, default 4): 4

    First sector (34-977105026, default = 830621696) or {+-}size{KMGTP}: 830621696

    Last sector (830621696-977105026, default = 977105026) or {+-}size{KMGTP}: 977104895

    Current type is 'Apple HFS/HFS+'

    Hex code or GUID (L to show codes, Enter = AF00): p

    Hex code or GUID (L to show codes, Enter = AF00): w

    Hex code or GUID (L to show codes, Enter = AF00): y

    Hex code or GUID (L to show codes, Enter = AF00):

     

    How should I proceed ?

  • by Loner T,

    Loner T Loner T Jan 15, 2016 7:47 PM in response to wykstra
    Level 7 (24,098 points)
    Safari
    Jan 15, 2016 7:47 PM in response to wykstra

    You can press Ctrl+C and abort Gdisk. Start the Gdisk again...

     

    sudo gdisk /dev/disk0

    x

    l (This is is lower case L )

    1 (This is digit 1 )

    m (Go to main menu)

    o (Create a new GPT)

    n (New)

    1

    40

    409639

    EF00

    n

    2

    409640

    829351119

    AF00

    n

    3

    829351120

    830620655

    AB00

    n

    4

    830621696

    977104895

    p

    w

    y


  • by wykstra,

    wykstra wykstra Jan 15, 2016 7:56 PM in response to Loner T
    Level 1 (0 points)
    Jan 15, 2016 7:56 PM in response to Loner T

    Sorry I didn't understand. After ctrl+c, do you want me to do the command below and reenter the values that entered before ?

     

    sudo gdisk /dev/disk0

    x

    l (This is is lower case L )

    1 (This is digit 1 )

    m (Go to main menu)

    o (Create a new GPT)

     

    Hex code or GUID (L to show codes, Enter = AF00): ^CBackups-MacBook-Pro:~ backup$ sudo gdisk /dev/disk0

    Password:

    GPT fdisk (gdisk) version 1.0.1

     

    Caution: invalid backup GPT header, but valid main header; regenerating

    backup header from main header.

     

    Caution! After loading partitions, the CRC doesn't check out!

    Warning! Main and backup partition tables differ! Use the 'c' and 'e' options

    on the recovery & transformation menu to examine the two tables.

     

    Warning! One or more CRCs don't match. You should repair the disk!

     

    Partition table scan:

      MBR: MBR only

      BSD: not present

      APM: not present

      GPT: damaged

     

    Found valid MBR and corrupt GPT. Which do you want to use? (Using the

    GPT MAY permit recovery of GPT data.)

    1 - MBR

    2 - GPT

    3 - Create blank GPT

     

    Your answer: x

    Warning! Main partition table overlaps the first partition by 34 blocks!

    You will need to delete this partition or resize it in another utility.

     

    Warning! Secondary partition table overlaps the last partition by

    4613656342287257470 blocks!

    You will need to delete this partition or resize it in another utility.

     

    Command (? for help): l

    0700 Microsoft basic data  0c01 Microsoft reserved    2700 Windows RE         

    3000 ONIE boot             3001 ONIE config           3900 Plan 9             

    4100 PowerPC PReP boot     4200 Windows LDM data      4201 Windows LDM metadata

    4202 Windows Storage Spac  7501 IBM GPFS              7f00 ChromeOS kernel    

    7f01 ChromeOS root         7f02 ChromeOS reserved     8200 Linux swap         

    8300 Linux filesystem      8301 Linux reserved        8302 Linux /home        

    8303 Linux x86 root     8304 Linux x86-64 root (/  8305 Linux ARM64 root

    8306 Linux /srv            8307 Linux ARM32 root   8400 Intel Rapid Start  

    8e00 Linux LVM             a500 FreeBSD disklabel     a501 FreeBSD boot       

    a502 FreeBSD swap          a503 FreeBSD UFS           a504 FreeBSD ZFS        

    a505 FreeBSD Vinum/RAID    a580 Midnight BSD data     a581 Midnight BSD boot  

    a582 Midnight BSD swap     a583 Midnight BSD UFS      a584 Midnight BSD ZFS   

    a585 Midnight BSD Vinum    a600 OpenBSD disklabel     a800 Apple UFS          

    a901 NetBSD swap           a902 NetBSD FFS            a903 NetBSD LFS         

    a904 NetBSD concatenated   a905 NetBSD encrypted      a906 NetBSD RAID        

    ab00 Recovery HD           af00 Apple HFS/HFS+        af01 Apple RAID         

    af02 Apple RAID offline    af03 Apple label           af04 AppleTV recovery   

    af05 Apple Core Storage    bc00 Acronis Secure Zone   be00 Solaris boot       

    bf00 Solaris root          bf01 Solaris /usr & Mac Z  bf02 Solaris swap       

    bf03 Solaris backup        bf04 Solaris /var          bf05 Solaris /home      

    bf06 Solaris alternate se  bf07 Solaris Reserved 1    bf08 Solaris Reserved 2 

    Press the <Enter> key to see more codes: 1

    bf09 Solaris Reserved 3    bf0a Solaris Reserved 4    bf0b Solaris Reserved 5 

    c001 HP-UX data            c002 HP-UX service         ea00 Freedesktop $BOOT  

    eb00 Haiku BFS             ed00 Sony system partitio  ed01 Lenovo system partit

    ef00 EFI System            ef01 MBR partition scheme  ef02 BIOS boot partition

    f800 Ceph OSD              f801 Ceph dm-crypt OSD     f802 Ceph journal       

    f803 Ceph dm-crypt journa  f804 Ceph disk in creatio  f805 Ceph dm-crypt disk i

    fb00 VMWare VMFS           fb01 VMWare reserved       fc00 VMWare kcore crash p

    fd00 Linux RAID           

     

    Command (? for help): m

    b back up GPT data to a file

    c change a partition's name

    d delete a partition

    i show detailed information on a partition

    l list known partition types

    n add a new partition

    o create a new empty GUID partition table (GPT)

    p print the partition table

    q quit without saving changes

    r recovery and transformation options (experts only)

    s sort partitions

    t change a partition's type code

    v verify disk

    w write table to disk and exit

    x extra functionality (experts only)

    ? print this menu

     

    Command (? for help):

  • by Loner T,

    Loner T Loner T Jan 15, 2016 8:02 PM in response to wykstra
    Level 7 (24,098 points)
    Safari
    Jan 15, 2016 8:02 PM in response to wykstra

    Ctrl+C will put you back at Terminal prompt without any changes. This is why you are being asked to choose the GPT again, because we aborted the entire session without any changes.

     

    You will need to choose 2 for GPT, and use the experts 'l' command to change alignment to 1 sector and recreate the new GPT, and rebuild the partition table.

  • by wykstra,

    wykstra wykstra Jan 15, 2016 8:07 PM in response to Loner T
    Level 1 (0 points)
    Jan 15, 2016 8:07 PM in response to Loner T

    Command (? for help): sudo gdisk /dev/disk0

    You may need to edit /etc/fstab and/or your boot loader configuration!

     

    Unable to proceed.

  • by Loner T,

    Loner T Loner T Jan 15, 2016 8:19 PM in response to wykstra
    Level 7 (24,098 points)
    Safari
    Jan 15, 2016 8:19 PM in response to wykstra

    wykstra wrote:

     

    Command (? for help): sudo gdisk /dev/disk0

    This is entered in OS X Terminal. You are trying to enter Gdisk command, within Gdisk. . I suggest you use Ctrl+C and start over again.

     

    Notice what you did here...

    Hex code or GUID (L to show codes, Enter = AF00): ^CBackups-MacBook-Pro:~ backup$ sudo gdisk /dev/disk0

    Password:

    GPT fdisk (gdisk) version 1.0.1

  • by wykstra,

    wykstra wykstra Jan 15, 2016 8:23 PM in response to Loner T
    Level 1 (0 points)
    Jan 15, 2016 8:23 PM in response to Loner T

    Command (? for help): ^CBackups-MacBook-Pro:~ backup$ sudo gdisk /dev/disk0

    Password:

    GPT fdisk (gdisk) version 1.0.1

     

    Caution: invalid backup GPT header, but valid main header; regenerating

    backup header from main header.

     

    Caution! After loading partitions, the CRC doesn't check out!

    Warning! Main and backup partition tables differ! Use the 'c' and 'e' options

    on the recovery & transformation menu to examine the two tables.

     

    Warning! One or more CRCs don't match. You should repair the disk!

     

    Partition table scan:

      MBR: MBR only

      BSD: not present

      APM: not present

      GPT: damaged

     

    Found valid MBR and corrupt GPT. Which do you want to use? (Using the

    GPT MAY permit recovery of GPT data.)

    1 - MBR

    2 - GPT

    3 - Create blank GPT

     

    Your answer: 2

    Warning! Main partition table overlaps the first partition by 34 blocks!

    You will need to delete this partition or resize it in another utility.

     

    Warning! Secondary partition table overlaps the last partition by

    4613656342287257470 blocks!

    You will need to delete this partition or resize it in another utility.

     

    Command (? for help): x

     

    Expert command (? for help): l

    Enter the sector alignment value (1-65536, default = 2048): 1

     

    Expert command (? for help): m

     

    Command (? for help): o

    This option deletes all partitions and creates a new protective MBR.

    Proceed? (Y/N): Y

     

    Command (? for help): n

    Partition number (1-128, default 1): 1

    First sector (34-977105026, default = 2048) or {+-}size{KMGTP}: 40

    Information: Moved requested sector from 40 to 2048 in

    order to align on 2048-sector boundaries.

    Use 'l' on the experts' menu to adjust alignment

    Last sector (2048-977105026, default = 977105026) or {+-}size{KMGTP}: 409639

    Current type is 'Apple HFS/HFS+'

    Hex code or GUID (L to show codes, Enter = AF00): EF00

    Changed type of partition to 'EFI System'

     

    Command (? for help): n

    Partition number (2-128, default 2): 2

    First sector (34-977105026, default = 411648) or {+-}size{KMGTP}: 409640

    Information: Moved requested sector from 409640 to 411648 in

    order to align on 2048-sector boundaries.

    Use 'l' on the experts' menu to adjust alignment

    Last sector (411648-977105026, default = 977105026) or {+-}size{KMGTP}: 829351119

    Current type is 'Apple HFS/HFS+'

    Hex code or GUID (L to show codes, Enter = AF00): AF00

    Changed type of partition to 'Apple HFS/HFS+'

     

    Command (? for help): n

    Partition number (3-128, default 3): 3

    First sector (34-977105026, default = 829351936) or {+-}size{KMGTP}: 829351120

    Information: Moved requested sector from 829351120 to 829351936 in

    order to align on 2048-sector boundaries.

    Use 'l' on the experts' menu to adjust alignment

    Last sector (829351936-977105026, default = 977105026) or {+-}size{KMGTP}: 830620655

    Current type is 'Apple HFS/HFS+'

    Hex code or GUID (L to show codes, Enter = AF00): AB00

    Changed type of partition to 'Recovery HD'

     

    Command (? for help): n

    Partition number (4-128, default 4): 4

    First sector (34-977105026, default = 830621696) or {+-}size{KMGTP}: 830621696

    Last sector (830621696-977105026, default = 977105026) or {+-}size{KMGTP}: 977104895

    Current type is 'Apple HFS/HFS+'

    Hex code or GUID (L to show codes, Enter = AF00): p

    Hex code or GUID (L to show codes, Enter = AF00): w

    Hex code or GUID (L to show codes, Enter = AF00): y

    Hex code or GUID (L to show codes, Enter = AF00): Command (? for help): ^CBackups-MacBook-Pro:~ backup$ sudo gdisk /dev/disk0

    Password:

    GPTChanged type of partition to 'Unknown'

     

    Command (? for help): Disk /dev/disk0: 977105060 sectors, 465.9 GiB

    Logical sector size: 512 bytes

    Disk identifier (GUID): 88F4692E-9F35-456C-9697-5E587B80E492

    Partition table holds up to 128 entries

    First usable sector is 34, last usable sector is 977105026

    Partitions will be aligned on 2048-sector boundaries

    Total free space is 6009 sectors (2.9 MiB)

     

    Number  Start (sector)    End (sector)  Size       Code  Name

       1            2048          409639   199.0 MiB   EF00  EFI System

       2          411648       829351119   395.3 GiB   AF00  Apple HFS/HFS+

       3       829351936       830620655   619.5 MiB   AB00  Recovery HD

       4       830621696       977104895   69.8 GiB    FFFF  Unknown

     

    Command (? for help):

  • by Loner T,

    Loner T Loner T Jan 15, 2016 8:31 PM in response to wykstra
    Level 7 (24,098 points)
    Safari
    Jan 15, 2016 8:31 PM in response to wykstra

    This does not look correct. You did change the alignment, but Gdisk seems to have ignored it.

     

    First sector (34-977105026, default = 2048) or {+-}size{KMGTP}: 40

    Information: Moved requested sector from 40 to 2048 in

    order to align on 2048-sector boundaries.

    Use 'l' on the experts' menu to adjust alignment

  • by Loner T,

    Loner T Loner T Jan 15, 2016 8:35 PM in response to wykstra
    Level 7 (24,098 points)
    Safari
    Jan 15, 2016 8:35 PM in response to wykstra

    Quit out of Gdisk. Please post the output of

     

    sudo gpt -vv -r show /dev/disk0

  • by wykstra,

    wykstra wykstra Jan 15, 2016 10:14 PM in response to Loner T
    Level 1 (0 points)
    Jan 15, 2016 10:14 PM in response to Loner T

    Command (? for help): ^CBackups-MacBook-Pro:~ backup$ sudo gpt -vv -r show /dev/disk0

    Password:

    gpt show: /dev/disk0: mediasize=500277790720; sectorsize=512; blocks=977105060

    gpt show: /dev/disk0: MBR at sector 0

    gpt show: /dev/disk0: Bad CRC in GPT table at sector 2

          start       size  index  contents

              0          1         MBR

              1  830621695      1  MBR part 66

      830621696  126003200      2  MBR part 66

      956624896   20478116      3  MBR part 66

      977103012       2048        

    Backups-MacBook-Pro:~ backup$

  • by Loner T,

    Loner T Loner T Jan 16, 2016 7:24 AM in response to wykstra
    Level 7 (24,098 points)
    Safari
    Jan 16, 2016 7:24 AM in response to wykstra

    This may be bug in GDisk 1.0.1, let me find out. Let us split the work into two steps.

     

    Step A - Creates a blank GPT. Choose 2 for GPT, if prompted.

     

    sudo gdisk /dev/rdisk0

    o

    p

    w

    y

    q

     

    Step B. Create individual entries .

     

    sudo gdisk /dev/rdisk0

    x

    l (This is is lower case L )

    1 (This is digit 1 )

    m (Go to main menu)

    n (New)

    1

    40

    409639

    EF00

    n

    2

    409640

    829351119

    AF00

    n

    3

    829351120

    830620655

    AB00

    n

    4

    830621696

    977104895

    0700

    p

    w

    y

  • by wykstra,

    wykstra wykstra Jan 16, 2016 8:44 AM in response to Loner T
    Level 1 (0 points)
    Jan 16, 2016 8:44 AM in response to Loner T

    Command (? for help): p

    Disk /dev/rdisk0: 977105060 sectors, 465.9 GiB

    Logical sector size: 512 bytes

    Disk identifier (GUID): 98FD6F70-9B53-4580-97E3-D98EB0E0228D

    Partition table holds up to 128 entries

    First usable sector is 34, last usable sector is 977105026

    Partitions will be aligned on 1-sector boundaries

    Total free space is 1188 sectors (594.0 KiB)

     

    Number  Start (sector)    End (sector)  Size       Code  Name

       1              40          409639   200.0 MiB   EF00  EFI System

       2          409640       829351119   395.3 GiB   AF00  Apple HFS/HFS+

       3       829351120       830620644   619.9 MiB   AB00  Recovery HD

       4       830621696       977104895   69.8 GiB    0700  Microsoft basic data

     

    Command (? for help): w

     

    Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING

    PARTITIONS!!

     

    Do you want to proceed? (Y/N): y

    OK; writing new GUID partition table (GPT) to /dev/rdisk0.

    Warning: The kernel may continue to use old or deleted partitions.

    You should reboot or remove the drive.

    The operation has completed successfully.

    Backups-MacBook-Pro:~ backup$

Previous Page 2 of 4 last Next