Method One:
1, open "Disk Management" in the utility in Mac OS X;
2, then select the Mac disk, click to verify the disk permissions about three minutes;
3, after the completion of verification, and then click "Repair Disk Permissions";
4, restart the computer and then enter the bootcamp can be normal partition.
Method Two:
1, the Apple Boot, has been holding down the Command+s key to boot to Single-user mode.
2, the system load (appear root #), enter the lowercase fsck-f command and press ENTER (return),
3, about 1 minutes after the checking, prompted the Volume Macintosh HD was repaired successfully (volume Macintosh HD repair succeeded)
4, re-enter the reboot press ENTER to reboot to the Apple system, the Boot Camp Assistant and the disk tool has been able to partition properly. (If the last hint is volume Macintosh HD appears to be OK, it may not work.) )
5, if the first execution of Fsck-f, did not repair successfully, try the second, the same operation, the implementation of/sbin/fsck-f finally show the success of the repair. You can partition it properly.