I have a Magic Trackpad 2 that's been having some intermittent slowdown when connected normally. After turning off Bluetooth generally on macOS the Magic Trackpad 2 works great all of the time with no lag/slowdown.
Clearly the problem is with the Bluetooth connection having some kind of interference or such and so I'd like to operate it with the USB cable (as I already have it plugged in 100% of the time anyway) only.
How can I, therefore, permanently disassociate a Magic Trackpad 2 device once it's been paired with macOS?