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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

Sep 14, 2017 9:40 AM in response to Loner T

How did you go on from there? To me, it tells me "operation not permitted" when i get to the "write" step!

Loner T

Level 9

59,513 points

Jan 4, 2017 4:23 AM in response to AdisakMacBookPro

Please start a new discussion. See Find answers and ask new questions for a reference.

Berkusar

Level 1

11 points

Feb 1, 2017 7:24 AM in response to Loner T

here you go

windows 10 operating system gives error after I add a new partition

Loner T

Level 9

59,513 points

Feb 14, 2017 10:30 AM in response to pham van manh

If you have a similar issue, please start a new discussion in Boot Camp .

Please also see

Writing an effective Apple Support Communities question

Find answers and ask new questions

Blynkyn

Level 1

12 points

Apr 14, 2017 9:19 PM in response to Loner T

I've created the following thread:

Win7 missing from boot list

Are you able to assist?

Loner T

Level 9

59,513 points

May 13, 2017 9:30 AM in response to raffin.rana

Please post your query in iPhone forum.

Can you use If your iPhone, iPad, or iPod touch is lost or stolen - Apple Support to lock/erase your phone?

Loner T

Level 9

59,513 points

May 19, 2017 8:22 PM in response to Narisetty 250

Your iPad may get malware/adware, but a virus is very unlikely. Please post a new discussion in iPad .

Loner T

Level 9

59,513 points

Jul 25, 2014 8:27 AM in response to MacTavish_10

Please post the output of

1. diskutil list

2. sudo fdisk /dev/<DiskWhereYouHaveInstalledBootcamp>

3. sudo gpt -v -r show /dev/<DiskWhereYouHaveInstalledBootcamp>

Bootcamp webpage clearly warns about this.

Yosemite also warns about installing on a backup mac. It also creates a hidden Recovery in addition to what you may already have for Mavericks.

MacTavish_10 Author

Level 1

30 points

Jul 25, 2014 8:52 AM in response to Loner T

I only read about the possible affect on Bootcamp after I did the partition 😟

Here is the Disk Utility:

sudo gpt -r -vv show disk0

sudo fdisk /dev/disk0

Loner T

Level 9

59,513 points

Jul 25, 2014 9:04 AM in response to MacTavish_10

sudo fdisk -e /dev/disk0

setpid 4

flag 4

write

Now Reboot and hold the ALT key and check if Windows shows up and is bootable.

If you get 'missing operating system', then Windows Startup Repair and see if Windows will comeback alive.

If you notice the difference between the Disk Utility screen (two partitions) vs the fdisk output (or the GPT) there are 'hidden' partitions and the MBR partitioning style used for Windows allows a maximum of 4 partitions. If you need further explanation, read the original thread.

Yosemite should not be installed on any machine that is critical to you. If only partitioning was done, but Yosemite was NOT installed, you are in better shape. Yosemite ignores and is unaware of bootcamp and creates an additional Recovery HD and moves things around.