Bootcamp no bootable device

Question

Level 1

8 points

Bootcamp no bootable device

I have a MacBook Pro and i installed windows 7x64 just fine used it for about 2 months, and I searched the internet to see if there was a way to increase the bootcamp partition storage, the solution was to create a new partition but i didn't know that it would mess up my windows partition so i went with it now it says that there is no bootable device. I can see windows file from finder and i can also see it from system preferences but i can't boot it and it also doesn't show up when i hold the option key.

Anyone know how to fix this error without erasing bootcamp and starting from scratch. Any help would be appreciated thanks

Windows, Windows 6

Posted on May 14, 2020 12:08 PM

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Answer 1

Loner T

Level 9

59,526 points

May 15, 2020 4:50 AM in response to Sunny0023

Sunny0023 wrote:

it worked like a charm thanks bro.

Excellent!

But i have one last question, is there any way to resize my windows partition without messing it up or do i just have to buy an external hardrive if i want more space?

Apple does not officially support resizing the Bootcamp partition. However,

You can use cloning software to backup/restore Windows, or,
the method in Bootcamp Partition Missing after Resize - Apple Community .

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Answer 2

Loner T

Level 9

59,526 points

May 14, 2020 8:48 PM in response to Sunny0023

Since you can see Windows files in Finder, let us try the simpler fix. Ignore the i386 MBR error, but not any other errors.

Run

sudo fdisk -e /dev/disk0

p

setpid 4

07

flag 4

p

w

y

Reboot and check if you can see Bootcamp in System Preferences -> Startup Disks. If yes, select and try to boot Windows.

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Answer 3

Sunny0023 Author

Level 1

8 points

May 14, 2020 4:57 PM in response to Loner T

Luiss-MacBook-Pro:~ luis$ diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *250.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS Macintosh HD 109.2 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data BOOTCAMP 140.0 GB disk0s4

Luiss-MacBook-Pro:~ luis$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=250059350016; sectorsize=512; blocks=488397168

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 488397167

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 213280952 2 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

213690592 1269536 3 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

214960128 273436672 4 GPT part - EBD0A0A2-B9E5-4433-87C0-68B6B72699C7

488396800 335

488397135 32 Sec GPT table

488397167 1 Sec GPT header

Luiss-MacBook-Pro:~ luis$ sudo fdisk /dev/disk0

Disk: /dev/disk0 geometry: 30401/255/63 [488397168 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 - 213280952] HFS+

3: AB 1023 254 63 - 1023 254 63 [ 213690592 - 1269536] Darwin Boot

4: 0C 1023 254 63 - 1023 254 63 [ 214960128 - 273436672] Win95 FAT32L

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Answer 4

Sunny0023 Author

Level 1

8 points

May 14, 2020 9:06 PM in response to Loner T

But when i types the first command in terminal this shows up

Luiss-MacBook-Pro:~ luis$ sudo fdisk -e /dev/disk0

Password:

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

Enter 'help' for information (I didnt notice that you said ignore the i386 error my bad)

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Answer 5

Sunny0023 Author

Level 1

8 points

May 14, 2020 9:35 PM in response to Loner T

Dude you're a flipping legend, it worked like a charm thanks bro. But i have one last question, is there any way to resize my windows partition without messing it up or do i just have to buy an external hardrive if i want more space? Thanks again

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