So I am trying to create a partition via Disk Utility. I have no other partitions other than my main one. When I try to create one, it just says "Modifying partition map" and it's been doing that for a while. I know making a partition (about 15GB is what I am trying to do) should take no more than a few minutes, but after 10 minutes it just says the same thing. I've tried it several times, restarted, checked the disk via the installation disk, but I still cannot create a partition. I even tried in boot camp but still nothing. The only time I can create one is if it is at the minimum 5GB size. Then it does it fine. But I want it bigger than that, and no matter what it wont do it. Help please? ETA: Also, one time I actually got a progress bar, but half way through I got an error saying there wasn't enough disk space even though I have 41GB free.