Dunno. It may be that this gaming laser gizmo like overloads the system drivers. My issue isn't identical to Greg's, it zooms just fine with the scroll wheel, it just that if I try to pan (without zooming) with the scroll wheel pressed, it also zooms despite that I don't want it to. My guess comes from the fact that Logitech says that this mouse delivers a lot more data, and faster, than any other. I could of course try loading Logitech's drivers, or USB Overdrive, or use the Setpoint trick you described, but I haven't found time. It's not that big an issue, yet. And as Greg says, the mouse without the gaming weights is very nice, comfortable and light.
Besides, I think even if it IS a hardware problem, it's probably too esoteric to explain to the reseller heavily enough to get a refund... I simply don't bother... call me lazy, and you'd be speaking truth
Edited: -Come to think of it, I'm using the mouse plugged into the keyboard of the outdated hardware in my signature... it's USB 1.1... maybe I should just try to plug it into the USB 2.0 card I have instead. That card should at least be fast enough for any mouse! And it's a fast check. I'll do it tomorrow at work.
AC4.1-AC26SWE; MacOS13.5.1; MP5,1+MBP16,1