I do have one other curious issue since upgrading to Sierra. At shutdown or restart, the iMac no longer gives the typical spinning circle it used to. I'm not sure what it's called (it's not the spinning beachball), it white on a black background that rotates clockwise and looks like the hash marks on a clock. My screen just goes blank, making it hard to determine if anything is happening until the restart or shutdown occurs.
Anyone have a clue what might cause that indicator to disappear?
I’ve always thought of it as a fast running clock - sort of a: “While you wait, we’re going as fast as we can.â€
It may have disappeared from Apple, but it’s popped up elsewhere. Netflix uses the same indicator while a movie is loading ….so I wonder if it’s some sort of copyright issue.