Hello, I am unable to change certain permissions on a folder "WikiServer" (/Library/Application Support/Apple). There is a user listed, "(unknown)" who has full control. I am unable to do anything with this user on this folder despite me taking ownership, giving myself full control, and unlocking the folder. Who/what is this user? Can I query a list of all non-system users? I only have my account (admin) and a guest account (disabled) on this system. I've noticed an additional user "Wheel" on a number of folders. Is this a system thing? I don't believe so because she shows up wherever Mickey Mouse stuff is going on. Also when running Disk Utility, even form a direct boot from CD, I am unable repair permissions on a number of folders. If booting from a CD does not allow me full control, what does? I thought a CD boot was a fail safe in this regard. Please advise. Thanks.