Whenever I log in a window appears, looks like an Apple program from the icon style displayed in the window, and asks for my iCloud password.

I don't remember installing the program, ever using it, or adding it to my login items. I can in fact not see any to me unknown program in my login items.

What is it?

enter image description here

(I made my iCloud user name invisible to the casual observer.)

  • The icon is for Messages, which comes with OS X. Look at your Dock and I'm willing to bet it's there and set to run at login. – tubedogg Nov 4 '14 at 18:18
  • No, there was nothing in the Dock and it wasn't set to run at login. – Andrew J. Brehm Nov 5 '14 at 19:34

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