Mac partition no longer accessible

So I got a shiney new Macbook Pro and I needed Windows on it as well so one of the first things I did was use Bootcamp to install Windows 8.1. This worked great. Setup was easy and I haven't had any trouble using either system. Then, earlier today I needed to add another partition on the windows side so I could lock it with Bitlocker. And here is where everything fell apart.
The new partition worked fine but I've recently discovered that the computer can no longer see the original OS X partition so I'm stuck in Windows (although at this point I could see the recovery drive if I held option on restart). In an attempt to fix this I removed the new partition which means I can no longer see the recovery drive and only the windows drive is visible when I start up while holding the option key. Windows is still working fine though.
Much googling indicates that this is a fairly common problem. Unfortunately for me, it seems that people usually lose the Windows partition instead of the Mac partition so all of the solutions involve running commands and programs from the Mac side of this. I did manage to get into the Disk Utility in recovery mode and identify my mac drive as "disk1s4" (since it's the only one formatted to "Mac OS Extended"). When I verified the disk it said it needed to be repaired. When I tried to repair the disk it just told me it couldn't and said I should back up as many files as I can and format the disk.
I would obviously like to find a way to restore the mac partition to working order but at this point I'm not really opposed to just formatting it. I don't have any files on there that don't also exist elsewhere and it won't take me too long to reinstall the programs I'd installed. However, I figured I should clarify some things before jumping off any more cliffs.
1) Will formatting the Mac partition and re-installing OS X do anything to my Bootcamp installation? Will I have to reinstall the windows partition as well?
2) Is there any way of adding/removing partitions in this scenario without breaking Bootcamp?
Any help would be greatly appreciated.

imho then bootcamp is not much more troublesome then installing a clean install of windows on a computer which didn't have it preinstalled but for many people thats not for them
other then that macs really really like to use the apple bootcamp drivers letting windows update or manually installing driver mean you're gonna have a bad time
for people who need not play 3d games or use very taxing applications a vitual machine is likely better

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My setup is an iMac with bootcamp running Mountain Lion and Windows 7. I have had them both installed and running for a long time. After using Mac OS for a while I wanted to boot into windows, so I shut down then machine and held the option key to select the OS. I noticed that the Mac partition no longer showed. I could however boot into and run windows with no problems.
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nflynn01,
First, what email program on your computer are you using to access your .Mac account? If its the Mac OS X's Mail, open it and go to Preferences, then the Account tab. Under the name you have given your .Mac account does it say .Mac, IMAP or POP3?
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where you able to solve this problem? I'm now facing a similar issue.

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Mac OS X 10.7.5
I was running Paragon Camptune to expand my Windows 7 partition. The progress bar reached the end and stayed there for about 30 minutes. The Camptune window was then accidentally closed and Camptune quit itself. I restarted the computer but the Windows partition no longer shows up when I try to boot it, only Mac OSX and Recovery Disk. The Bootcamp drive is no longer accessable from System Preferences, and the Bootcamp partition folder is no longer accessable in the Devices area of Finder. Camptune no loner recognizes that there was a partition. Thus, I am no longer able to access the partition's contents or delete it and make a new one.
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*** Report for internal hard disk ***
Current GPT partition table:
#      Start LBA      End LBA Type
1             40       409639 EFI System (FAT)
2         409640   1151635239 Mac OS X HFS+
3     1151635456   1152904991 Mac OS X Boot
Current MBR partition table:
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1              1       409639 ee EFI Protective
2         409640   1151635239 af Mac OS X HFS+
3     1151635456   1152904991 ab Mac OS X Boot
MBR contents:
Boot Code: Unknown, but bootable
Partition at LBA 40:
Boot Code: None (Non-system disk message)
File System: FAT32
Listed in GPT as partition 1, type EFI System (FAT)
Partition at LBA 409640:
Boot Code: None
File System: HFS Extended (HFS+)
Listed in GPT as partition 2, type Mac OS X HFS+
Listed in MBR as partition 2, type af Mac OS X HFS+
Partition at LBA 1151635456:
Boot Code: None
File System: HFS Extended (HFS+)
Listed in GPT as partition 3, type Mac OS X Boot
Listed in MBR as partition 3, type ab Mac OS X Boot

Hi Eric,
Bootcamp does show up in the disk utility but it is grey instead of black like the Macintosh HD.
The following information is available:
Mount Point: Not mounted
Format: Windows NT File System (NTFS)
Owners Enabled: -
Number of Folders: -
Capacity: 274.55 GB
Available: -
Used: -
Number of Files: -
What might be the best way to continue to repair it. I do not have the option to click on "verify disk permissions" or "Repair Disk Permissions".
Should I clone the hard drive in the target disk mode??
I'm not the best at this stuff so any more advice would be greatly appreciated!
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Hi,
if I remember correctly Parallels installs some kind of file system driver to OSX to access NTFS files system partitions.
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Hi,
I'm using a MacBook Pro with two partitions, Windows 8.1 (Bootcamp) en Mac OS X. I upgraded Mac OS from 10.9 to 10.10 (Yosemite) recently.
After upgrading, the Mac partition in Windows is no longer visible. I need it to be visible, as I have files on that partition which I need to access in Windows.
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<ProductManufacturer>Apple Inc.</ProductManufacturer>
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<ProductCode>{FA2B2C2A-EA41-495A-9308-60726125D562}</ProductCode>
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appears that apple has changed SMB code, and now its not possible login from windows on mac.
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apple is capable to make it run paying new license of smb code, but isnted of this, apple has created new protocol smbx and now, all others need to adapt your code to apple..
bad movement.. i am thinking sell imac and no back to apple anymore..

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Hello all!
I got a new hard drive for my Mac Book Pro and an enclosure so I could clone the old partitions on to the new drive.
So I...
Put the new hard drive in the enclosure.
Booted up off an install disk and ran disk utility.
Copied the Mac and Bootcamp partitions over to the new drive that was connected VIA USB.
Turned off the computer, took the old hard drive out and put it in the enclosure.
Put the new hard drive in the Mac Book Pro.
Booted into Mac OSX with no problem.
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I got it. It CAN be done. At least on 10.6
How I made it happen (for free) on Snow Leopard:
1) partition, dupe etc all that jazz that you know. Make the mac side work, which it seems we've all been able to do no issues. I used SuperDuper! It worked just fine. (Had it on a disk. I assume you could use any other free way of doing this.)
2) New hard drive running, I used bootcamp assistant to partition the new drive for a new Bootcamp. I don't know if it's necessary to make the new partition this way for some reason, but it's what the process ultimately included, so maybe try without, but it worked with.
3) Natively running original drive on the windows side. Used DirveImage XML to clone windows partition onto new drive connected externally.
4) Back on new hard drive running natively. (Sorry for all the switching.) You'll note that the new Bootcamp partition is NOT bootable at this point. It won't come up in the usual 'alt on startup' boot menu.
Download rEFInd and install on mac side. Technically this is freeware or w/e, but for the love of god, throw money at this man. He totally deserves it.
5) Restarting the computer, rEFInd's boot manager finally recognizes windows. But you'll find windows is a little messed up and still won't quite boot. Get out your Windows CD and pop it in. Do the 'alt boot' thing. Your boot menu options are now "EFI Manager," "Bootcamp," and "Windows Disk." Or some such. Holy Crap! It recognizes Windows!
6) Boot to the CD and tell it to repair the windows volume. It will. My computer also had to do a disk check next time I booted to Windows, which took for-stupid-ever, but eventually worked. (I went to bed in between.)
7) Everything is running smoothly. Plus, you get the rEFInd boot manager, which is also great.
Deets: I have a late 2010 MBP 13". Snow leopard/Windows 7 32-bit (long story) Moved from original 320GB seagate momentus to new 750GB Seagate Momentus XT.
Feel free to share/copy&paste this solution as you see useful. Cheers!

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I'm not really understanding what the end goal was. But in case anyone else comes across the thread, neither the built-in Windows volume resizing utility nor any 3rd party Windows resizing utility should be used to resize either the Windows partition or the Mac OS partition. Invariably they all manipulate the NTFS volume in such a way that the secondary GPT is corrupt, the primary GPT is rendered invalid, and only correctly alter the MBR. It's a recipe for data loss.
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Lack of harddisk space can indeed be the cause for the problems you have.
Have a read here http://www.thexlab.com/faqs/lackofram.html
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Hi.
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Mac partition no longer accessible

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