I have an external drive that I use for cloning, and when I booted up into it, I was gettings ome strange popup form asking for a Keychain password or something like that. (I didn't bother to write it down.) I have never used the keychain, because my fear is that it shares the same weakness as password managers. Anyways... The only way I can think that the Keychain was set up, was when I was having all of the issues with my two Retina last year (or the year before?) and I broke down and finally sent them back to Apple for a logic board swap out. If the tech did something my with Keychain, and then I cloned that drive, it might have carried over to my clone. At any rate, if I just format this suspect drive, will that eliminate any strange mssages about the Keychain, or do I have a bigger issue? Thanks.