Apple does not encourage you to use a mouse with a scroller, so Apple set the direction of the mouse scroller totally reversed.
Solution: UnatrualScrollWheels
Official shortcut CMD+` not always work.
Solution: AltTab
Solution: Do not active headphone mic, use built-in mic instead (seriously?)
Solution: Download additional_Tools_for_Xcode_9 and run bluetooth explorer
Solution: no solution