Well, if it's her account that is causing the popup, and if she doesn't use it, just open her account and provide Keychain an admin password. I had thought from your original post that it was popping up in YOUR account for the Keychain password. When you open Keychain, you have to give an Administrators password. Assuming your account is an Admin account, your password should do. Once you've given it that first time, you shouldn't have to repeat it again. That's how it's working on my MBP. You'll need to repeat that on her login account on the MBP, if that's where the popups are occurring. What you are then saying to the OS is that "I am authorized to use Keychain" when you login to keychain from your account and "She is authorized to use keychain" when you repeat that on her account.