Since I got my MacBook Air I keep having an issue where, as far as I can tell, some unknown app that doesn't have UI is activating and taking focus. It happens maybe 2-3 times a day. When it happens, the app I'm using is still the front-most visible app, but it's no longer active—so if I'm typing, or trying to use a keyboard command, it doesn't work. I've tried to track down the cause in Console, but there's so much data there I can't tell what's going on. Any idea now to track this down? #MacOS