Bootcamp doesn't show up on startup, but shows up in startup disks in system preferences

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Level 1

8 points

Bootcamp doesn't show up on startup, but shows up in startup disks in system preferences

Hey, I have an iMac 21.5-inch, Mid 2010 running Mac OS 10.11 El Capitan Beta. I just installed windows on my bootcamp partition. I didn't install it through the DVD at boot after the partition was created because my superdrive is broken. So, I have just been booting up with the option/alt key and selecting the Macintosh HD drive to boot from. Otherwise it goes into a screen that says "no bootable disk- Insert boot disk and press any key". I installed windows on the partition by creating a Virtualbox Virtual Machine of Windows 7 Professional, and cloning the image onto the bootcamp partiton (as showed step-by-step in this article- http://huguesval.com/blog/2012/02/installing-windows-7-on-a-mac-without-superdri ve-with-virtualbox/ ). Now i'm trying to boot into windows from my bootcamp partition and it's not showing up in the boot menu at startup. However, if you go to system preferences and startup disks, it shows windows as a startup disk. I have selected windows as the main startup disk but it goes into the no boot disk screen before it boots windows. Is there any way to fix this without deleting my bootcamp partition?

iMac (21.5-inch Mid 2010), OS X El Capitan (10.11)

Posted on Oct 31, 2015 5:56 PM

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Answer 1

Loner T

Level 9

59,471 points

Oct 31, 2015 6:35 PM in response to TheDirtySox

Can you post the output of the following OS X Terminal commands?

diskutil list

sudo gpt -vv -r show /dev/disk0

sudo fdisk /dev/disk0

Do you have any third-party NTFS software?

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Answer 2

TheDirtySox Author

Level 1

8 points

Nov 1, 2015 2:42 PM in response to Loner T

No I do not have any third-party NTFS software. Here are the commands and their output:

diskutil list:

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *1.0 TB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 903.3 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data 96.0 GB disk0s4

sudo gpt -vv -r show /dev/disk0:

gpt show: /dev/disk0: mediasize=1000204886016; sectorsize=512; blocks=1953525168

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

gpt show: /dev/disk0: Pri GPT at sector 1

gpt show: /dev/disk0: Sec GPT at sector 1953525167

start size index contents

0 1 MBR

1 1 Pri GPT header

2 32 Pri GPT table

34 6

40 409600 1 GPT part - C12A7328-F81F-11D2-BA4B-00A0C93EC93B

409640 1764345952 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

1764755592 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

1766025128 88

1766025216 187498496 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

1953523712 1423

1953525135 32 Sec GPT table

1953525167 1 Sec GPT header

sudo fdisk /dev/disk0:

Disk: /dev/disk0 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 - 409639] <Unknown ID>

2: AF 1023 254 63 - 1023 254 63 [ 409640 - 1764345952] HFS+

3: AB 1023 254 63 - 1023 254 63 [1764755592 - 1269536] Darwin Boot

4: 0B 1023 254 63 - 1023 254 63 [1766025216 - 187498496] Win95 FAT-32

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Answer 3

Loner T

Level 9

59,471 points

Nov 1, 2015 2:49 PM in response to TheDirtySox

Please post the output of

sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C

This will show the first block of the Bootcamp volume.

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Answer 4

TheDirtySox Author

Level 1

8 points

Nov 1, 2015 5:18 PM in response to Loner T

Okay, here's the output to sudo dd if=/dev/rdisk0s4 count=1 2>/dev/null | hexdump -C:

00000000 eb 52 90 4e 54 46 53 20 20 20 20 00 02 08 00 00 |.R.NTFS .....|

00000010 00 00 00 00 00 f8 00 00 3f 00 ff 00 00 28 03 00 |........?....(..|

00000020 00 00 00 00 80 00 80 00 f8 ff 2c 0b 00 00 00 00 |..........,.....|

00000030 00 00 0c 00 00 00 00 00 02 00 00 00 00 00 00 00 |................|

00000040 f6 00 00 00 01 00 00 00 8e 20 5b 00 30 5b 00 8c |......... [.0[..|

00000050 00 00 00 00 fa 33 c0 8e d0 bc 00 7c fb 68 c0 07 |.....3.....|.h..|

00000060 1f 1e 68 66 00 cb 88 16 0e 00 66 81 3e 03 00 4e |..hf......f.>..N|

00000070 54 46 53 75 15 b4 41 bb aa 55 cd 13 72 0c 81 fb |TFSu..A..U..r...|

00000080 55 aa 75 06 f7 c1 01 00 75 03 e9 dd 00 1e 83 ec |U.u.....u.......|

00000090 18 68 1a 00 b4 48 8a 16 0e 00 8b f4 16 1f cd 13 |.h...H..........|

000000a0 9f 83 c4 18 9e 58 1f 72 e1 3b 06 0b 00 75 db a3 |.....X.r.;...u..|

000000b0 0f 00 c1 2e 0f 00 04 1e 5a 33 db b9 00 20 2b c8 |........Z3... +.|

000000c0 66 ff 06 11 00 03 16 0f 00 8e c2 ff 06 16 00 e8 |f...............|

000000d0 4b 00 2b c8 77 ef b8 00 bb cd 1a 66 23 c0 75 2d |K.+.w......f#.u-|

000000e0 66 81 fb 54 43 50 41 75 24 81 f9 02 01 72 1e 16 |f..TCPAu$....r..|

000000f0 68 07 bb 16 68 70 0e 16 68 09 00 66 53 66 53 66 |h...hp..h..fSfSf|

00000100 55 16 16 16 68 b8 01 66 61 0e 07 cd 1a 33 c0 bf |U...h..fa....3..|

00000110 28 10 b9 d8 0f fc f3 aa e9 5f 01 90 90 66 60 1e |(........_...f`.|

00000120 06 66 a1 11 00 66 03 06 1c 00 1e 66 68 00 00 00 |.f...f.....fh...|

00000130 00 66 50 06 53 68 01 00 68 10 00 b4 42 8a 16 0e |.fP.Sh..h...B...|

00000140 00 16 1f 8b f4 cd 13 66 59 5b 5a 66 59 66 59 1f |.......fY[ZfYfY.|

00000150 0f 82 16 00 66 ff 06 11 00 03 16 0f 00 8e c2 ff |....f...........|

00000160 0e 16 00 75 bc 07 1f 66 61 c3 a0 f8 01 e8 09 00 |...u...fa.......|

00000170 a0 fb 01 e8 03 00 f4 eb fd b4 01 8b f0 ac 3c 00 |..............<.|

00000180 74 09 b4 0e bb 07 00 cd 10 eb f2 c3 0d 0a 41 20 |t.............A |

00000190 64 69 73 6b 20 72 65 61 64 20 65 72 72 6f 72 20 |disk read error |

000001a0 6f 63 63 75 72 72 65 64 00 0d 0a 42 4f 4f 54 4d |occurred...BOOTM|

000001b0 47 52 20 69 73 20 6d 69 73 73 69 6e 67 00 0d 0a |GR is missing...|

000001c0 42 4f 4f 54 4d 47 52 20 69 73 20 63 6f 6d 70 72 |BOOTMGR is compr|

000001d0 65 73 73 65 64 00 0d 0a 50 72 65 73 73 20 43 74 |essed...Press Ct|

000001e0 72 6c 2b 41 6c 74 2b 44 65 6c 20 74 6f 20 72 65 |rl+Alt+Del to re|

000001f0 73 74 61 72 74 0d 0a 00 8c a9 be d6 00 00 55 aa |start.........U.|

00000200

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Answer 5

Loner T

Level 9

59,471 points

Nov 1, 2015 5:22 PM in response to TheDirtySox

Let us try the simpler fix first. Since you have El Capitan, you will need to disable System Integrity Protection.

1. Boot into Local Recovery (Command+R) during power up.

2. Run Utilities -> Terminal.

3. Type csrutil disable and press return/enter.

4. Boot normally.

5. Type csrutil status in OSX Terminal and verify that is it disabled. If still enabled, repeat.

Please ignore i386 MBR messages, but not any others.

sudo fdisk -e /dev/disk0

p

setpid 4

07

flag 4

p

w

y

Reboot and Test.

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Answer 6

TheDirtySox Author

Level 1

8 points

Nov 4, 2015 6:30 PM in response to Loner T

I tried it too or three times and its says its still enabled. Do I just keep trying?

Here's the output of csrutil status-

System Integrity Protection status: enabled (Custom Configuration).

Configuration:

Apple Internal: disabled

Kext Signing: disabled

Filesystem Protections: disabled

Debugging Restrictions: disabled

DTrace Restrictions: disabled

NVRAM Protections: disabled

This is an unsupported configuration, likely to break in the future and leave your machine in an unknown state.

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Answer 7

Loner T

Level 9

59,471 points

Nov 4, 2015 6:35 PM in response to TheDirtySox

No. This is apparently a bug in the csrutil. If all flags are disabled, the overall status should also be disabled, but it is not. Please continue with the Fdisk steps.

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Answer 8

TheDirtySox Author

Level 1

8 points

Nov 4, 2015 7:07 PM in response to Loner T

Ok, so I did the Fdisk steps, rebooted and still no bootcamp partition when holding down alt/option. I'm not them best at working the terminal and I might have done something wrong so heres the commands and the output-

fdisk: could not open MBR file /usr/standalone/i386/boot0: No such file or directory

Enter 'help' for information

fdisk: 1> p

Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 sectors]

Offset: 0 Signature: 0xAA55

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

------------------------------------------------------------------------

1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] <Unknown ID>

2: AF 1023 254 63 - 1023 254 63 [ 409640 - 1764345952] HFS+

3: AB 1023 254 63 - 1023 254 63 [1764755592 - 1269536] Darwin Boot

4: 0B 1023 254 63 - 1023 254 63 [1766025216 - 187498496] Win95 FAT-32

fdisk: 1> setpid 4

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

------------------------------------------------------------------------

4: 0B 1023 254 63 - 1023 254 63 [1766025216 - 187498496] Win95 FAT-32

Partition id ('0' to disable) [0 - FF]: [B] (? for help) 07

fdisk:*1> 07

Invalid command '07'. Try 'help'.

fdisk:*1>

fdisk:*1> flag 4

Partition 4 marked active.

fdisk:*1> p

Disk: /dev/disk0 geometry: 121601/255/63 [1953525168 sectors]

Offset: 0 Signature: 0xAA55

Starting Ending

#: id cyl hd sec - cyl hd sec [ start - size]

------------------------------------------------------------------------

1: EE 1023 254 63 - 1023 254 63 [ 1 - 409639] <Unknown ID>

2: AF 1023 254 63 - 1023 254 63 [ 409640 - 1764345952] HFS+

3: AB 1023 254 63 - 1023 254 63 [1764755592 - 1269536] Darwin Boot

*4: 07 1023 254 63 - 1023 254 63 [1766025216 - 187498496] HPFS/QNX/AUX

fdisk:*1> w

Device could not be accessed exclusively.

A reboot will be needed for changes to take effect. OK? [n] n

MBR unchanged

fdisk:*1> y

Invalid command 'y'. Try 'help'.

Also, now theres no boot disk error when I start the computer anymore.

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Answer 9

Loner T

Level 9

59,471 points

Nov 4, 2015 7:12 PM in response to TheDirtySox

TheDirtySox wrote:

Ok, so I did the Fdisk steps, rebooted and still no bootcamp partition when holding down alt/option. I'm not them best at working the terminal and I might have done something wrong so heres the commands and the output-

A reboot will be needed for changes to take effect. OK? [n] n

MBR unchanged

fdisk:*1> y

Invalid command 'y'. Try 'help'.

Also, now theres no boot disk error when I start the computer anymore.

Notice the MBR Unchanged. Instead of typing 'n' at the question, type 'y'. Once the MBR has been written, you can verify it with a 'p' (print). Type 'q' and Reboot and Test.

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Answer 10

TheDirtySox Author

Level 1

8 points

Nov 5, 2015 6:46 PM in response to Loner T

Okay, so I repeated the steps and typed in y instead of n this time. My bad, haha. The bootcamp partition did not show up when I held down alt/option at boot but, I tried booting up from windows by going to system settings and startup disk, and rebooted. The computer booted up with a black screen and a cursor blinking at the top right corner of the screen (the blinking white line), except it just stayed on the black screen with the blinking cursor for about 4 hours and didn't do anything. So I decided to reboot it and start it back up in OSX, and here I am now. The computer was getting really warm though, like it would if I were to play a game, not sure if that is relevant or not.

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