m Reinstalling Bootcamp win 10 problem

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Level 1

9 points

m Reinstalling Bootcamp win 10 problem

So long story short. I wanted more space on my windows partition but i messed up I think i deleted the wrong partition and so i reinstalled Mac OS and when i try to run bootcamp assistant it tells me what i wrote below:

(copied and pasted from my thread on another forum)

I tried to install bootcamp but it still gave me that same error about needing one single partition https://puu.sh/uJ5g5/4112e2106a.png. I tried restarting my mac but then the prohibited sign came up again. Then i restart again and hold the option key and it shows me this screen:

https://puu.sh/uJ4Xx/61f4de5deb.png

clicking mac os x (which i renamed from untitled to that after i reinstalled mac) will take me to my mac but the two others dont work they just show the prohibited sign.

I'm thinking I have some hidden partitions or something because in my previous thread when i was trying to expand the partition I saw other partitions that I don't see on Disk utility but I do see on windows disk manager

https://puu.sh/uDv1U/56d9ae902a.png << this is from my previous thread.

EDIT: I read on a thread that I should merge the partitions so they can become one

https://discussions.apple.com/thread/6586339 If you click view all replies u will see what im talking about. My diskutil list shows the same as that guy but my order is switched. I tried doing the merge but it just showed me information http://puu.sh/uJ6Ra/f0140b098b.jpg so i tried doing what the example said to do and this happened: http://puu.sh/uJ7qb/d42ade1410.jpg

This is what i see when I do diskutil list

http://puu.sh/uJ5K8/899ede2ff5.jpg

I followed a guide to remove Windows and Boot from the EFI and leaving only the apple folder. (http://apple.stackexchange.com/questions/122192/remove-windows-entry-from-mac-bo ot-loader)

I know this thread is kinda all over the place but here are my first two threads that I had. I came here because i dont think anyone knows how to help on those forums.

1st post: http://www.mac-forums.com/running-windows-or-anything-else-on-your-mac/339859-in creasing-bootcamp-partition-size.html

2nd post: http://www.mac-forums.com/running-windows-or-anything-else-on-your-mac/339907-pa rtition.html

@LonerT

I hope you can help me fix this.

MacBook Air, macOS Sierra (10.12.3)

Posted on Mar 14, 2017 6:13 PM

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Answer 1

Best reply

Loner T

Level 9

59,471 points

Mar 15, 2017 2:07 AM in response to Rummyyy

Do you have GPT Fdisk (https://sourceforge.net/projects/gptfdisk/) installed on the current OS X installation? If yes, we can use it to create a new GPT using the following steps. You may need to disable SIP, before the write command will work (Please do not enter text like this). Do not reboot till the GPT is fully created.

sudo gdisk /dev/disk0

m (main menu)

o (create a new GPT)

p (print)

w (write)

y (confirm write)

q (quit)

sudo gdisk /dev/disk0

x (expert mode)

l (set alignment... letter "L")

1 (... to one sector)

m (main menu)

n (new)

1 (GPT1)

40 (start)

+409600 (notice the "+" sign. used for size)

EF00 (EFI)

n (new)

2 (GPT2)

409640 (start)

+71025344 (notice the "+" sign. used for size)

AF00 (Apple JHFS+)

n (new)

3 (GPT3)

71434984 (start)

+1269536 (notice the "+" sign. used for size)

AB00 (Apple Boot/Recovery HD)

n (new)

4 (GPT1)

72704520 (start)

+164011472 (notice the "+" sign. used for size)

AF00 (JHFS+)

p (print)

w (write)

y (confirm write)

q (quit)

Reboot and test if you can boot from either OS X version.

What is the current version of OS X and the one you had before this issue started? What is the year/model of your Mac?

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Answer 2

Loner T

Level 9

59,471 points

Mar 14, 2017 7:41 PM in response to Rummyyy

Rummyyy wrote:

@LonerT

I hope you can help me fix this.

I will try.

Based on the diskutil list, you have a couple of different issues. The order of the partitions is non-standard. Also, you have 84GB on a 121GB disk.

Can you post the text output of

diskutil resizeVolume disk0s3 "limits"

Here is an example from my Mac, with a standard layout.

diskutil list

/dev/disk0 (internal, physical):

#: TYPE NAME SIZE IDENTIFIER

0: GUID_partition_scheme *512.1 GB disk0

1: EFI EFI 209.7 MB disk0s1

2: Apple_HFS OSY-MBP13 380.3 GB disk0s2

3: Apple_Boot Recovery HD 650.0 MB disk0s3

4: Microsoft Basic Data BOOTCAMP 131.0 GB disk0s4

diskutil resizeVolume disk0s2 "limits"

For device disk0s2 OSY-MBP13:

Current size: 380.3 GB (380250431488 Bytes)

Minimum size: 294.9 GB (294900465664 Bytes)

Maximum size: 380.3 GB (380250431488 Bytes)

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Answer 3

Rummyyy Author

Level 1

9 points

Mar 14, 2017 7:59 PM in response to Loner T

Laurens-Air:~ lauren$ diskutil resizeVolume disk0s3 "limits"

Resize limits for partition disk0s3 Mac OS X:

Current partition size on map: 84.0 GB (83973873664 Bytes)

Minimum size (constrained by file usage): 18.5 GB (18489335808 Bytes)

Recommended minimum size (if used for OS): 29.2 GB (29226754048 Bytes)

Maximum size (constrained by map space): 84.0 GB (83973873664 Bytes)

Just to be clear I've had windows 10 bootcamp working fine until i decided to try to get more disk space on it and ended up messing it up. Whenever i restart my computer it shows the prohibited error sign. But when i press option key as it turns on i can select 3 options to boot. Macintosh HD, Mac OS (New install of mac i made) and Windows. Macintosh and windows doesn't work and just shows the prohibited sign error but the new install of mac i made works fine.

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Answer 4

Rummyyy Author

Level 1

9 points

Mar 14, 2017 8:33 PM in response to Loner T

Laurens-Air:~ lauren$ sudo gpt -vv -r show /dev/disk0

Password:

gpt show: /dev/disk0: mediasize=121332826112; sectorsize=512; blocks=236978176

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

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

gpt 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 71025344

71434984 1269536 2 GPT part - 426F6F74-0000-11AA-AA11-00306543ECAC

72704520 164011472 3 GPT part - 48465300-0000-11AA-AA11-00306543ECAC

236715992 262151

236978143 32 Sec GPT table

236978175 1 Sec GPT header

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Answer 5

Loner T

Level 9

59,471 points

Mar 15, 2017 2:07 AM in response to Rummyyy

You have a large gap between GPT1 and GPT2. This is the typical location of OS X when the Mac comes from the factory. We should recreate the GPT and test if the OS X is recoverable in this standard location.

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Answer 6

Rummyyy Author

Level 1

9 points

Mar 14, 2017 9:52 PM in response to Loner T

Mac book air 13 inch early 2015 10.12.3. haven't updated or changed anything before or after the issue started. I will try this stuff now. I will get back to you when i complete this. It may be a day or two before you hear from me I have to do some other stuff irl. But thank you very much for the help. Don't worry i'll be back.

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Answer 7

Rummyyy Author

Level 1

9 points

Mar 14, 2017 11:12 PM in response to Loner T

Okay so now whenever i reboot I see three options now. MacintoshHD and MacintoshHD And then the Mac os (the one that currently works) I've tried both of the macintoshHD but they just get stuck loading about 60% of the way

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Answer 8

Rummyyy Author

Level 1

9 points

Mar 14, 2017 11:31 PM in response to Loner T

Oh but now when i boot into recovery and check disk utility i see the old MacintoshHD again. So now i have MacintoshHD And MacOS which is where i reinstalled mac to yesterday.

Also i tried waiting for both of them. They end up loading but they show that prohibited sign error.

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Answer 9

Rummyyy Author

Level 1

9 points

Mar 14, 2017 11:57 PM in response to Loner T

I figured it out (I think) I went onto my new mac install and i opened disk utility and i erased/formatted the macintoshHD and then booted into recovery and reinstalled mac onto macintoshHD. It's installing right now so im assuming its going to work. And if it does after that i will remove the mac os X drive i was using as im assuming that one is actually a partition and macintoshHD is my real drive since it says that it cannot be removed as it is the original volume.

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Answer 10

Loner T

Level 9

59,471 points

Mar 14, 2017 8:29 PM in response to Rummyyy

Let us look at the current GPT entries. Post the output of

sudo gpt -vv -r show /dev/disk0

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Answer 11

Rummyyy Author

Level 1

9 points

Mar 14, 2017 8:57 PM in response to Loner T

Oh I see. So how should I proceed with that?

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Answer 12

Rummyyy Author

Level 1

9 points

Mar 14, 2017 10:44 PM in response to Loner T

nvm i got time to do it now. I'll post back in a few minutes.

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Answer 13

Rummyyy Author

Level 1

9 points

Mar 15, 2017 2:01 AM in response to Loner T

Yup after it installed I went to disk utility and removed the partition and was able to install windows 10 again via bootcamp! Thank you so very much @LonerT you're a genius!!

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Answer 14

Loner T

Level 9

59,471 points

Mar 15, 2017 5:26 AM in response to Rummyyy

Excellent. Please back up OS X, Windows and create a Windows System Restore point.

Can you post the current output of

diskutil list

diskutil cs list

it can help future readers of the discussion?

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