I have a weird issue that makes my Magic Mouse 2 usage experience very uncomfortable on iMac 27.
The problem is: when I move the mouse vertically (up or down), tracking works very slow. That is: I have to raise and move my mouse 3-4 times to reach the bottom of the screen (assuming I started from the very top).
On the other hand, moving in a horizontal direction with the same speed works like a charm.
OS X Sierra, tracking speed is set to maximum and no third party applications used.
Is there a way to fix this?