Today the mouse hovering functionality on my Mac simply stopped working. Moving my mouse to the dock causes one icon to enlarge, but then sliding left and right does not cause the others to enlarge.
In menus I can click on a menu, but then the menu items don't light up as I pull down. I can click on a submenu to see it but I don't see it on hover.
This behavior happens with both my Logitech mouse and my Apple Trackpad.
This behavior came out of nowhere, I restarted my Mac but it did not help.