I just installed my Mac Mini and having a frustrating problem with the Magic Mouse 2. It does connect but it is acting erratically -- sometimes moves slow -- sometimes really fast and inaccurate. I was using the same mouse on my MacBook Pro without any problems as well as the mouse/MacBook Pro on the same external monitor. I have disconnected the mouse, reconnected, rebooted etc. but it is still not right. The keyboard and the touchpad does work well and as expected. Any ideas? This is really disrupting my enjoyment of the new computer.