I just got a new mini a couple weeks ago and have been running/loading all my stuff on an external 1tb USB drive. Then in comes my brother who changes all the permissions, then reboots the computer. Needless to say it would not boot, I tried even booting from the internal drive and it just kept looping. (blue screen-wheel, blue screen-wheel) I had 2 Super Duper partitions on the USB drive neither would boot and both said they were bootable. I had to reload the internal by disk then clone the first partition over. 1. Why would neither bootable partitions on the USB drive boot? 2. What would cause the internal drive not to boot ? 3. When I go to System Preferences/ Startup Disk I can only see the internal drive, but yet the 1st partition is now suppose to be the startup disk? (it did show once) 4. Is making 2 bootable partitions on the same USB drive the right thing in case one partition goes bad? 5. Is there a special key press for the new mini's since they don't have firewire only USB? Thanks..