If you used bootcamp to create a partition before for one of your other attempts it is possible that either the creation or destruction of a prior bootcamp partition resulted in a broken partition. I recently had that third option greyed out for me and discovered it was because it had failed to create a new BOOTCAMP partition correctly and the 30GB of space magically disappeared and there was no drive assignment to the partition. I had to back-up my Mac HD with time machine, create a USB bootable drive of Yosemite, and completely re-format the entire drive and re-install my OS and files for it to come back. I would recommend using Disk Utility to see if a portion of your HD space is missing. For instance, I had a 250GB drive and my Mac HD partition showed up as having 220GB but there was no other partition (not even a free space one) explaining the whereabouts of the missing 30GB of data storage. The missing 30GB didn't show up until I used Disk Utility from a Yosemite boot disk and when it did it was labeled as Free space that I could not bring back into the primary partition. I had to re-partition and re-format the drive into HFS+.
moghees007
Level 1
(9 points)
