Your disk could not be partitioned. Win7 Bootcamp

I'm attempting to load Win7 on MBPr with Bootcamp 5.0 and am getting the error "Your disk could not be partitioned. An error occurred while partitioning disk." No other information leads me to understand the problem. Does anyone know anything about this error and how to fix? User uploaded file

MacBook Pro, OS X Mountain Lion (10.8.3), 15-Inch, 2.53Ghz, Mid 2009.

Posted on Mar 21, 2013 6:25 PM

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52 replies

Dec 20, 2014 1:12 PM in response to Csound1

So for those of you that like myself are still getting the error even after trying Frog_T's instructions, the problem may be related to FileVault. I had elected to encrypt the disk when I first set up my Mac. FileVault was stuck and it said plug in the computer to finish the encryption process but plugging in didn't make a difference and the encryption process wouldn't progress.


Unfortunately, I don't have a safer solution other than just reinstallingOS X by rebooting with command+R, erasing the disk, and then reinstalling Yosemite (in my case). I still had access to everything in my hard drive so I could back up whatever I wanted.

Hope this saves you some time, because I had no errors on my disk no matter which way I checked. FileVault was the culprit for me.

Jan 6, 2015 1:48 AM in response to neopirus

The post from neopirus actually led me to the solution for this issue - in my case at least. There seems to be a problem with FileVault encryption, where the process pauses for no reason and then gets stuck at that point. This then seems to block any attempt to format the disk, for whatever reason, whether it be the installation of Bootcamp / Windows, or even simply creating a new partition through Disk Utility. In all other aspects, the disk is fine, and the various verify/repair procedures suggested neither report nor fix any problems.


At the time of writing this post, there is no fix for the encryption problem, although certain users have had success with various suggestions (see FileVault stuck on "Encryption Paused"). I needed to erase all the data on my drive and reinstall OS X, making sure I turned file encryption OFF. Bootcamp then worked perfectly - no partition errors, no problems at all.


I hope that helps someone, and maybe saves them the five hours I wasted trying to overcome this problem.

Feb 14, 2015 7:37 AM in response to swissclive

Thanks so much swissclive. I noticed my filevault was on ''paused encryption'' status, and figured that was stopping bootcamp from partitioning the disk. could not fix the filevault issue, and was forced to restore my mac. when restoring chose not to use filevault, then when OS X was restored, used boot camp to install windows and all worked just fine! after a few hours now I have running OS X and windows 7 via boot camp perfectly!

Apr 28, 2015 7:27 AM in response to Frog_T

Thank you! the second part helped me and now windows 8.1 is on my macbook pro 😀 if only swtor and flash fxp was available on mac 😟 but I get the best of both worlds this way, i tried vmware fusion for a while but to use free osx upgrades you have to pay for upgrades and its not cheap.


I appreciate the solution you have provided, am going to save your post to a txtedit file so I dont lose it 🙂

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Your disk could not be partitioned. Win7 Bootcamp

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