[mac mini 2018] Wireless mouse pointer lag and jump when insert the USB hub
When I insert the USB hub or external hard disk in my Mac Mini 2018,
the wireless mouse pointer will be lagged and jump until unplug those Hardware.
How to fix this problem?
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Poorly shielded USB 3.0 cables and USB 3.0 devices can interfere with wireless devices.
see > Resolve Wi-Fi and Bluetooth issues caused by wireless interference - Apple Support
In this case, moving the USB 3.0 cables and devices away from your wireless keyboard, mouse and/or trackpad may help clear up the problem. If not, then you may need replace those thin poorly shielded cables with better cables.