Did a software update tonight which included the most recent EFI. Then I get a box after the update that asks for keychain access password. Tried every password I could remember and to no avail. The request box would not go away. So, then I reset my keychain access. I'm not at all familiar with keychain access. I don't know anything about it. Anyway, I look at the keychain access screen within utilities and I see something about root certificates not trusted. That doesn't sound good to me even though I have no idea what root certificates are. Why did the MBA ask for my keychain access in the first place, and what can I do about these untrustworthy (?) root certificates? I think I need some clarification and advice here. Never ran into anything like this with my MBP.