To further evaluate the cause of the issue one can use applications such as iStat Menus to look for usage spikes related to the lags. The problem could be associated with two applications in conflict, as the Apple macOS APIs can respond differently when two apps use them simultaneously. If this is the case, reactivate them one by one to find the exact culprit. Evaluate if the issue is resolved by disabling the applications. Disable all non-essential running applications - especially those directly affecting the cursor such as SmoothScroll, Scroll Reverser, Steelseries ExactMouse Tool, Steermouse, BetterTouchTool and so forth. The USB 3.x issue causes erratic behavior in the cursor which should then be gone. The solution that solved my problem was to unplug the bluetooth dongle from behind the computer and plug it into the right side of the Apple USB keyboard (which has a USB port on each side and is close to the mouse). If so, disconnect them and consider if the cursor movement changes. In my case I had lag problems using my Apple Magic Bluetooth Mouse on my hackintosh. Simply identify if any USB 3.x peripherals are connected. Reboot the mac- lets begin with rebooting the mac PC on your computer, while your mouse should be properly plugged in. I would begin by investigating if this issue applies to you before moving on to other sources. After disabling Bluetooth, disconnect the Mouse from your Mac > Wait for 30 seconds and connect the Mouse back to your Mac. Click on Bluetooth icon located at the top-right corner and Turn OFF Bluetooth. This interference is known to cause significant lag in the mouse response. Sometimes the problem of a laggy or slow mouse is due to interference from other Bluetooth devices that are close to your Mac. There does exist a problem with radio interference when using 2.4 GHz devices (Logitech Unifying Receiver / Bluetooth) along with a USB 3.x peripheral connected to the computer. Logitech Bluetooth mouse lag and stutter after Catalina upgrade FIX So I recently bought a. It is however recommended to try to connect them to a different computer to exclude this as a possible cause. Click Pair to pair each Bluetooth device with the Mac. Seeing as your issue affects several peripherals, it is less likely that they are defective. As the cause can be both hardware and software related, different measures have to be taken to examine the root cause of your cursor lag.
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