I have an iMac and a MBP in my home. Both are on my wireless network provided by my Time Capsule. All my data is on my iMac so when I want something I connect to it from my MBP via Finder. I have the same user name and password on both computers. Sometimes when I try to connect it doesn't ask for my credentials. The connection works sometimes but at other times it fails and I am prompted for a password on the 2nd attempt. So I'm left wondering why doesn't it ask for credentials every time? When it does connect without prompting for credentials who is it connecting as? I'm concerned this is a security issue. Anyone know what's going on here?