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MacTavish_10 Author

Level 1

30 points

Repairing Boot Camp after creating new partition

I'm running OS X 10.9 and Windows 7 x64 Pro.

I set up Boot Camp to dual-boot Windows on my MacBook Pro Retina. Everything was fine. And just yesterday Apple released the Yosemite Beta for the public and I wanted to download this and give it a try. After some research, I found that creating a separate partition was the way to go, and so I made another partition.

I wasn't aware that this would affect my Windows partition as I thought it was completely different.

So now, when I boot up, there is no option to boot with Windows. But when I boot the Mac and select Startup Disk, it shows Boot Camp is still there and all my files etc are still there.

I have a 256SSD, 160GB was for the Mac, and I have 90GB set for Windows.

I made the new partition to 40GB (and the Mac was now 120GB).

Then once I completed that part, I restarted my Mac and the Windows boot option was no longer there.

I didn't even install the Yosemite yet. I went to Disk Utility and deleted the 40GB partition that I made.

Now I don't know what to do. I have a lot of important things which are still on my Windows. Is there a way to restore normal Boot Camp functionality?

MacBook Pro (Retina, 13-inch, Late 2013), OS X Mavericks (10.9.4)

Posted on Jul 25, 2014 8:20 AM

180 replies

elyoe011

Level 1

0 points

Nov 24, 2014 5:46 AM in response to Loner T

YES!! Do I have to start a new thread? How do I revert what I have done?

THANK YOU for the quick response!!!!!

elyoe011

Level 1

0 points

Nov 24, 2014 6:24 AM in response to Loner T

Loner T,

I created the following thread:

Repairing Boot Camp after creating new partition

I need to know how to revert what I did? Thanks again!!

elyoe011

Level 1

0 points

Nov 24, 2014 7:17 AM in response to Loner T

Loner T,

How can I access the Console from boot? I have tried Command (⌘)-S and Command (⌘)-V but nothing happens, still showing "Missing Operating System"

Sorry for the many posts, I'm just trying to get this fix because is critical for me! I really appreciate your or any other help I can get.

Again, I started the below threat:

Repairing Boot Camp after creating new partition

u935

Level 1

0 points

Dec 31, 2014 6:16 AM in response to Loner T

Thank you Loner T

May 10, 2015 10:27 AM in response to MattTheMedic

I also problem restore macbook I use window 7dvd and my Mac can't restart wen I insert window 7 DVD I follow instruction but can install I need mbr

Godiex

Level 1

0 points

Aug 2, 2015 10:42 PM in response to Loner T

After years of searching these forums anonymously looking for solutions, I just created a user to join the support community for the first time, to say THANK YOU LONER T. I followed your instructions through several different pages regarding connected questions, in every answer you were super clear and always with great spirit. : ) thanks man, much appreciated.

Loner T

Level 9

59,513 points

Aug 3, 2015 4:34 AM in response to Godiex

Glad to see your issues resolved. Please post back if you run into any future issues.

Sep 1, 2015 5:03 PM in response to Loner T

Hi there Loner T!

Same issue as the rest of the poor people in this thread I'm afraid.

Can you help?

BOOTCAMP shows up in startup disk preferences but not showing up in bootloader when holding option key.

Here is the seperate thread!

Thanks so much in advance,

James

Sep 28, 2015 11:14 AM in response to Loner T

What is this? what do I do with it? You should explain instead of just typing random things

sudo fdisk -e /dev/disk0

setpid 4

flag 4

write

Loner T

Level 9

59,513 points

Sep 28, 2015 11:24 AM in response to Sébastien Shaikh

1. You do not trust a total stranger on the Internet to give you gobble-de-gook code on your Mac and steal and invade your privacy. 😁.

2. I suggest typing man fdisk and man sudo in OSX Terminal or see the following links.

https://developer.apple.com/library/prerelease/mac/documentation/Darwin/Referenc e/ManPages/man8/fdisk.8.html

https://developer.apple.com/library/prerelease/mac/documentation/Darwin/Referenc e/ManPages/man8/sudo.8.html

3. The code above marks Partition 4 as NTFS and makes it bootable as a legacy BIOS System partition.

clarusen

Level 1

0 points

Sep 30, 2015 1:06 AM in response to Loner T

Hi, Loner T

I have same issue with booting Windows 7. Please find the following thread about my question, thank you very much!

Boot Windows 7 is missing when reinstalled Mavericks

Mach04

Level 1

0 points

Oct 3, 2015 7:12 PM in response to Loner T

Hi Loner T,

Following your steps below:

sudo fdisk -e /dev/disk0

setpid 4

flag 4

write

After 'write' I get the prompt 'fdisk: /dev/disk0: Operation not permitted'

Do you know why ?

Really hoping you reply

Thanks

Loner T

Level 9

59,513 points

Oct 3, 2015 7:15 PM in response to Mach04

You are on OS X El Capitan and System Integrity Protection is enabled. Try to boot in Local Recovery (Command+R) and type csrutil disable and try again.

Mach04

Level 1

0 points

Oct 3, 2015 8:13 PM in response to Loner T

You are a PRO.

Thanks a lot. It worked perfectly.

Although the last command 'y' was recognised as invalid. My windows 7 reappeared, so I guess it is nothing to worry about.🙂

Oct 19, 2015 10:19 AM in response to Loner T

Hi Loner T

I following everything you advice and successful my window 7 reappeared. But why when i click into my window option, i turn into a black screen with a blinking _ command. Is this something wrong with my window and need reinstall?

Repairing Boot Camp after creating new partition