If the basic troubleshooting steps do not resolve the issue, try:
Another significant layer of complexity involves Bluetooth connectivity and power management. Most modern Mac users rely on wireless peripherals. A Magic Mouse suffering from low battery levels often exhibits erratic behavior before failing completely; scrolling may lag or stop while clicking still functions. Similarly, Bluetooth interference—caused by USB 3.0 devices or other wireless electronics—can cause packets of data to drop, leading to unresponsive scrolling. In these scenarios, a simple toggle of the Mac’s Bluetooth radio, a restart of the mouse, or connecting via a Lightning/USB-C cable can reset the connection and restore functionality. It serves as a reminder that wireless convenience often comes with the cost of connection stability. mac mouse scroll not working