To resolve the issue of the Apple Mouse not scrolling, try the following steps:
There are few minor frustrations in the modern digital workspace as acute as a mouse that refuses to scroll. One moment, you are gliding through a lengthy document or a sprawling webpage; the next, you are stuck, dragging the cursor to the sidebar to click and drag a tiny slider bar. When an Apple mouse—whether the iconic Mighty Mouse or the modern Magic Mouse—stops scrolling, it is rarely a sign of a catastrophic hardware failure. More often, it is a cry for help. apple mouse stopped scrolling
Here’s a concise review of the common issue where an Apple Mouse (Magic Mouse or older wired Mighty Mouse) stops scrolling, including causes and fixes. To resolve the issue of the Apple Mouse
It is easy to overlook the simplest explanation. In the Magic Mouse 2, a low battery can cause erratic behavior. The mouse might have enough power to move the cursor and click, but the complex processing required for touch-based scrolling may falter. Plugging the mouse in via the Lightning cable (located on the underside) for a few minutes will usually resolve this. More often, it is a cry for help
Over time, the internal rollers that detect the ball's movement become caked in a thin, grime-like residue. The ball may still click, but it loses the ability to register up-and-down or side-to-side movement.