![]() To rule that out, try keeping any new wireless electronics farther away from your mouse and Mac. If there are any new wireless electronic device nearby, it may cause interference to your Bluetooth mouse. Although the test results are not shown in this paper, similar impact was seen to Bluetooth radio performance.” Remove any new wireless electronic device nearby Since the noise from the USB 3.0 is broadband, it could potentially impact any radio whose antenna is close by. “A similar impact to wireless mouse performance was noted if a USB 3.0 device, such as a flash drive, was used. The impact to mouse performance was found to be the same whether the USB 3.0 peripheral device had data being actively written to it or if it was merely connected to the notebook computer and the link to it established.” At a distance of 3 feet and greater away from the notebook computer, a significant lag was experienced in the response of the mouse. “There is degradation in the performance of the wireless mouse when a USB 3.0 device is connected to the notebook computer. If you have any USB device connected to your Mac and your Bluetooth mouse happens to be laggy and jerky, try removing those USB devices.Īccording to the white paper “ USB 3.0* Radio Frequency Interference Impact on 2.4 GHz Wireless Devices” released Intel in April 2012: t/files/327216.pdf Remove any USB device connected to your Mac By restarting your Mac, you’re performing an SMC reset, which may help fix the wireless keyboard / mouse lag issue. Restarting your Mac often can fix temporary glitches like laggy mouse input and irregular mouse cursor. Re-pair your mouse according to the mouse pairing tutorial.Go to System Preferences > Bluetooth and remove your mouse from the Bluetooth devices list.To re-pair the mouse, you need to unpair it first. Sometimes the mouse lag issue would be fixed after you re-paired your Bluetooth mouse. You can also pull out its replaceable battery and reinsert it. You can turn it off, then turn it back on to see the mouse lag issue persists. It’s suggested that you use your mouse on a flat and clean surface. ![]() The mouse may not work properly if you use it on a bedsheet and such uneven surfaces. Make sure you’re using the mouse on a flat surface You can use a soft, dry cloth to clean the railing and remove any debris from the laser opening of the mouse and see if it lags again. A Magic Mouse 2 user reported in Apple Support Communities that if there were pieces of lint or hair in the cavity containing the IR light sensor, the mouse will become laggy. Make sure the bottom surface (especially the IR light sensor) is clean. If your mouse isn’t charged or has worn out batteries, the cursor will be laggy and jumpy. Unlike the wired mouse, the performance of the Bluetooth mouse is affected by its battery status.
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