You may only have two volumes when using Boot Camp Assistant - a Windows volume and an OS X volume. When you try to add a third then you destroy the use of the Windows volume you had, and it may also damage the OS X volume. To fix the problem you created you will need to re-partition the entire drive back to one OS X volume of the full size of the drive, then install OS X. Then use BCA to create a new Windows volume of the desired size.
Install OS X Using Network Recovery
Be sure you have backed up your files because the following procedure will remove everything from the hard drive.
Boot to the Network Recovery Server:
Restart the computer and after the chime press and hold down the COMMAND-OPTION- R keys until a globe appears on the screen. Wait patiently - 15-20 minutes - until the Recovery main menu appears.
Partition and Format the hard drive:
- Select Disk Utility from the main menu and click on the Continue button.
- After DU loads select your newly installed hard drive (this is the out-dented entry with the mfgr.'s ID and size) from the left side list. Click on the Partition tab in the DU main window.
- Under the Volume Scheme heading set the number of partitions from the drop down menu to one. Click on the Options button, set the partition scheme to GUID then click on the OK button. Set the format type to Mac OS Extended (Journaled.) Click on the Apply button and wait until the process has completed. Quit DU and return to the main menu.
Reinstall OS X: Select Reinstall OS X and click on the Continue button. Be sure to select the correct drive to use if you have more than one.
Note: You will need an active Internet connection. I suggest using Ethernet if possible because it is three times faster than wireless.
This should restore the version of OS X originally pre-installed on the computer.
TeamLycred
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