I'm trying to run bootcamp to install windows, but it won't partion. It says "Verification failed. This disk could not be partitioned. Use Disk Utility to repair this disk." I've repaired it, or least what I thought was repairing it. I went to Disk Utility, highlighted Macintosh HD and under "First Aid" I clicked "Repair Disk Permissions". It goes through the process and whatnot. Am I not choosing the correct repair? The button that says "Repair Disk" does not let me click on it. Anyone have any ideas?